diff --git a/locales/rn/en.json b/locales/rn/en.json
index dcaa97d2..2fab8f32 100644
--- a/locales/rn/en.json
+++ b/locales/rn/en.json
@@ -110,12 +110,104 @@
     "address_books": {
       "confirm_delete_count": "{count, plural, =0 {Delete \"{name}\"? This cannot be undone.} one {Delete \"{name}\"? Its # contact will be deleted with it. This cannot be undone.} other {Delete \"{name}\"? Its # contacts will be deleted with it. This cannot be undone.}}"
     },
+    "all_contacts": "All Contacts",
+    "bulk": {
+      "add_tag": "Add tag",
+      "delete_confirm_mobile": "{count, plural, one {Delete # contact? This cannot be undone.} other {Delete # contacts? This cannot be undone.}}",
+      "move_to_address_book": "Move to address book",
+      "tag_failed": "Tagging failed"
+    },
+    "contact": "Contact",
+    "create_hint_mobile": "Long-press to create a group instead",
+    "detail": {
+      "add_to_group_failed": "Add to group failed",
+      "copy_name": "{name} (Copy)",
+      "created_on": "Created {date}",
+      "duplicate_failed": "Duplicate failed",
+      "duplicate_no_book": "Cannot duplicate without an address book.",
+      "no_address_book": "No address book",
+      "not_found": "Contact not found",
+      "open_dialer_failed": "Cannot open dialer",
+      "open_link_failed": "Cannot open link",
+      "open_maps_failed": "Cannot open maps",
+      "open_sms_failed": "Cannot open messaging app",
+      "share": "Share",
+      "share_title": "Share {name}",
+      "sms": "SMS",
+      "timezone_value": "Timezone: {zone}",
+      "updated_on": "Updated {date}"
+    },
+    "empty_state_hint_mobile": "Tap + to add one",
     "export": {
       "failed": "Export failed"
     },
+    "form": {
+      "add_nickname": "Add nickname",
+      "add_note": "Add note",
+      "add_organization": "Add organization",
+      "address_book_required": "Select an address book to save this contact.",
+      "categories_placeholder_mobile": "Add tag and press Enter",
+      "context_none": "None",
+      "date_placeholder": "YYYY-MM-DD, YYYY-MM, YYYY or --MM-DD",
+      "display_name_optional": "Display name (optional)",
+      "display_name_placeholder": "Custom display name",
+      "edit_named": "Edit {name}",
+      "gender_unspecified": "Unspecified",
+      "grammatical_gender": "Grammatical gender",
+      "invalid_date_message": "\"{date}\" is not a date. Use YYYY-MM-DD, YYYY-MM, YYYY or --MM-DD.",
+      "invalid_date_title": "Invalid date",
+      "invalid_email_message": "\"{address}\" is not a valid email address.",
+      "invalid_email_title": "Invalid email",
+      "label": "Label",
+      "label_placeholder": "Work, Personal, …",
+      "missing_address_book": "Missing address book",
+      "missing_info": "Missing info",
+      "name_or_email_required": "Add a name or at least one email.",
+      "new_organization": "New organization",
+      "org_name_required": "Add the organization name.",
+      "photo_hint_mobile": "Tap photo to choose an image",
+      "photo_permission_message": "Grant photo library permission to pick a contact photo.",
+      "photo_permission_title": "Photo access needed",
+      "pick_date": "Pick a date",
+      "pronouns": "Pronouns",
+      "pronouns_placeholder": "they/them",
+      "url": "URL"
+    },
+    "group": "Group",
+    "groups": {
+      "add_member": "Add member",
+      "add_members": "Add members",
+      "add_members_failed": "Failed to add members",
+      "create_ellipsis": "New group…",
+      "delete_confirm_named": "Delete \"{name}\"? Members will not be deleted.",
+      "delete_failed": "Failed to delete group",
+      "email_all": "Email all",
+      "members_with_count": "Members ({count})",
+      "no_emails": "No emails",
+      "no_members_hint": "Tap \"Add member\" to get started",
+      "not_found": "Group not found",
+      "remove_member": "Remove member",
+      "remove_member_confirm": "Remove \"{name}\" from this group?",
+      "remove_member_failed": "Failed to remove member"
+    },
     "import": {
-      "into_address_book": "Import into address book"
-    }
+      "change_target": "Change",
+      "choose_file_mobile": "Choose a vCard file",
+      "failed_count": "{count, plural, one {# contact could not be imported.} other {# contacts could not be imported.}}",
+      "import_count": "Import {count}",
+      "into_address_book": "Import into address book",
+      "into_named": "Import into {name}",
+      "no_address_book": "Create an address book before importing contacts.",
+      "picker_failed": "Could not open the file picker"
+    },
+    "no_tags_hint": "No tags yet. Type one above.",
+    "picker": {
+      "add_count": "{count, plural, =0 {Add} other {Add (#)}}",
+      "title": "Add Contact"
+    },
+    "rename_tag_hint_mobile": "Long-press a tag to rename it",
+    "tag_name_placeholder": "New tag name",
+    "unnamed": "Unnamed"
   },
   "context_menu": {
     "color_tag": "Tag",
diff --git a/src/components/__tests__/contacts-i18n.test.ts b/src/components/__tests__/contacts-i18n.test.ts
new file mode 100644
index 00000000..aa2818d7
--- /dev/null
+++ b/src/components/__tests__/contacts-i18n.test.ts
@@ -0,0 +1,36 @@
+// Contacts screens and sheets whose every user-visible string goes through
+// t(). A literal English label, alert or JSX text sneaking back in stays
+// English in every locale, so this scans the source for them.
+import { describe, it, expect } from 'vitest';
+import { join } from 'node:path';
+import { findUntranslatedLiterals } from './untranslated-literals';
+
+const SRC = join(__dirname, '..', '..');
+
+// File (relative to src/) → texts that stay as they are on purpose.
+const TRANSLATED_FILES: Record<string, string[]> = {
+  'screens/ContactsScreen.tsx': [],
+  'screens/ContactDetailScreen.tsx': [],
+  // Service names are product names.
+  'screens/ContactFormScreen.tsx': ['LinkedIn, Mastodon, …'],
+  'screens/GroupDetailScreen.tsx': [],
+  'components/contacts/ContactActivity.tsx': [],
+  'components/contacts/ContactImportSheet.tsx': [
+    // Only reachable in a development build without the native module.
+    'Import unavailable',
+    'The file picker is not installed in this build. Rebuild the app (expo run:android) to enable importing.',
+  ],
+  'components/contacts/ContactsSidebarDrawer.tsx': [],
+  'components/contacts/AddressBookPickerSheet.tsx': [],
+  'components/contacts/ContactPickerSheet.tsx': [],
+  'components/contacts/TagAssignSheet.tsx': [],
+  'components/contacts/ContactListRow.tsx': [],
+};
+
+describe('translated contacts screens', () => {
+  for (const [file, allow] of Object.entries(TRANSLATED_FILES)) {
+    it(`${file} has no hard-coded English text`, () => {
+      expect(findUntranslatedLiterals(join(SRC, file), allow)).toEqual([]);
+    });
+  }
+});
diff --git a/src/components/contacts/AddressBookPickerSheet.tsx b/src/components/contacts/AddressBookPickerSheet.tsx
index f3e0eca5..3cf71758 100644
--- a/src/components/contacts/AddressBookPickerSheet.tsx
+++ b/src/components/contacts/AddressBookPickerSheet.tsx
@@ -8,6 +8,7 @@ import { spacing, radius, typography, componentSizes, type ThemePalette } from '
 import { useColors } from '../../theme/colors';
 import { useSheetDrag } from '../../lib/use-sheet-drag';
 import { useContactsStore } from '../../stores/contacts-store';
+import { useLocaleStore } from '../../stores/locale-store';
 
 interface Props {
   visible: boolean;
@@ -19,9 +20,10 @@ interface Props {
 }
 
 export default function AddressBookPickerSheet({
-  visible, onClose, currentBookId, onPick, title = 'Move to address book',
+  visible, onClose, currentBookId, onPick, title,
 }: Props) {
   const c = useColors();
+  const t = useLocaleStore((s) => s.t);
   const styles = React.useMemo(() => makeStyles(c), [c]);
   const insets = useSafeAreaInsets();
   const addressBooks = useContactsStore((s) => s.addressBooks);
@@ -61,7 +63,7 @@ export default function AddressBookPickerSheet({
       setNewName('');
       onPick(book.id);
     } catch (err) {
-      Alert.alert('Could not create address book', err instanceof Error ? err.message : 'Unknown error');
+      Alert.alert(t('contacts.address_books.create_failed', 'Failed to create address book'), err instanceof Error ? err.message : t('identities.validation_errors.unknown_error', 'Unknown error'));
     } finally {
       setBusy(false);
     }
@@ -83,8 +85,14 @@ export default function AddressBookPickerSheet({
             <View style={styles.handle} />
           </View>
           <View style={styles.header}>
-            <Text style={styles.title}>{title}</Text>
-            <Pressable onPress={onClose} hitSlop={8} style={styles.close}>
+            <Text style={styles.title}>{title ?? t('contacts.bulk.move_to_address_book', 'Move to address book')}</Text>
+            <Pressable
+              onPress={onClose}
+              hitSlop={8}
+              style={styles.close}
+              accessibilityRole="button"
+              accessibilityLabel={t('common.close', 'Close')}
+            >
               <X size={18} color={c.textSecondary} />
             </Pressable>
           </View>
@@ -100,6 +108,8 @@ export default function AddressBookPickerSheet({
                 key={book.id}
                 onPress={canTarget ? () => onPick(book.id) : undefined}
                 disabled={!canTarget}
+                accessibilityRole="button"
+                accessibilityState={{ disabled: !canTarget, selected: isCurrent }}
                 style={({ pressed }) => [styles.row, pressed && canTarget && styles.rowPressed]}
               >
                 <BookUser size={16} color={canTarget ? c.textSecondary : c.textMuted} />
@@ -115,7 +125,7 @@ export default function AddressBookPickerSheet({
             <View style={styles.createRow}>
               <TextInput
                 style={styles.createInput}
-                placeholder="New address book name"
+                placeholder={t('contacts.address_books.name_label', 'Address book name')}
                 placeholderTextColor={c.textMuted}
                 value={newName}
                 onChangeText={setNewName}
@@ -128,6 +138,8 @@ export default function AddressBookPickerSheet({
                 disabled={!newName.trim() || busy}
                 style={[styles.createBtn, (!newName.trim() || busy) && styles.createBtnDisabled]}
                 hitSlop={6}
+                accessibilityRole="button"
+                accessibilityLabel={t('contacts.address_books.create', 'New address book')}
               >
                 <Check size={16} color={c.primaryForeground} />
               </Pressable>
@@ -136,9 +148,10 @@ export default function AddressBookPickerSheet({
             <Pressable
               onPress={() => setCreating(true)}
               style={({ pressed }) => [styles.row, pressed && styles.rowPressed]}
+              accessibilityRole="button"
             >
               <Plus size={16} color={c.primary} />
-              <Text style={[styles.rowLabel, { color: c.primary }]}>New address book…</Text>
+              <Text style={[styles.rowLabel, { color: c.primary }]}>{t('contacts.address_books.create', 'New address book')}</Text>
             </Pressable>
           )}
         </ScrollView>
diff --git a/src/components/contacts/ContactActivity.tsx b/src/components/contacts/ContactActivity.tsx
index d78c3e4d..6a53dc77 100644
--- a/src/components/contacts/ContactActivity.tsx
+++ b/src/components/contacts/ContactActivity.tsx
@@ -9,7 +9,7 @@ import type { RootStackParamList } from '../../navigation/types';
 import { getEmails, queryEmailsByFilter } from '../../api/email';
 import { getEvents, queryEvents } from '../../api/calendar';
 import { useCalendarStore } from '../../stores/calendar-store';
-import { useLocaleStore } from '../../stores/locale-store';
+import { useLocaleStore, type TranslateFn } from '../../stores/locale-store';
 import { getEventColor } from '../../lib/calendar-utils';
 import { hasCalendarCapability } from '../../lib/capabilities';
 import { singleLine } from '../../lib/single-line';
@@ -76,8 +76,8 @@ function formatRelativeDate(iso: string): string {
   }
 }
 
-function formatEventTime(event: CalendarEvent): string {
-  if (event.showWithoutTime) return 'All day';
+function formatEventTime(event: CalendarEvent, t: TranslateFn): string {
+  if (event.showWithoutTime) return t('contacts.activity.all_day', 'All day');
   try {
     return format(parseISO(event.start), 'HH:mm');
   } catch {
@@ -189,7 +189,7 @@ export function ContactActivity({ contact }: Props) {
           <View style={styles.sectionIcon}>
             <MailIcon size={16} color={c.textMuted} />
           </View>
-          <Text style={styles.sectionLabel}>Recent emails</Text>
+          <Text style={styles.sectionLabel}>{t('contacts.activity.recent_emails', 'Recent Emails')}</Text>
         </View>
         <View style={styles.sectionBody}>
           {emailsLoading ? (
@@ -197,13 +197,13 @@ export function ContactActivity({ contact }: Props) {
               <ActivityIndicator size="small" color={c.primary} />
             </View>
           ) : emailsError ? (
-            <Text style={styles.emptyText}>Couldn't load emails.</Text>
+            <Text style={styles.emptyText}>{t('contacts.activity.load_failed', 'Failed to load')}</Text>
           ) : !emails || emails.length === 0 ? (
-            <Text style={styles.emptyText}>No emails with this contact.</Text>
+            <Text style={styles.emptyText}>{t('contacts.activity.no_emails', 'No recent emails')}</Text>
           ) : (
             emails.map((email) => {
               const sender = email.from?.[0];
-              const senderName = sender?.name || sender?.email || 'Unknown';
+              const senderName = sender?.name || sender?.email || t('contacts.activity.unknown_sender', 'Unknown sender');
               const preview = singleLine(email.preview);
               return (
                 <Pressable
@@ -243,21 +243,21 @@ export function ContactActivity({ contact }: Props) {
           <View style={styles.sectionIcon}>
             <CalendarDays size={16} color={c.textMuted} />
           </View>
-          <Text style={styles.sectionLabel}>Upcoming events</Text>
+          <Text style={styles.sectionLabel}>{t('contacts.activity.upcoming_events', 'Upcoming Events')}</Text>
         </View>
         <View style={styles.sectionBody}>
           {upcomingEvents.length === 0 ? (
-            <Text style={styles.emptyText}>No upcoming events.</Text>
+            <Text style={styles.emptyText}>{t('contacts.activity.no_events', 'No upcoming events')}</Text>
           ) : (
             upcomingEvents.map((event) => (
               <View key={event.id} style={styles.eventRow}>
                 <View
                   style={[styles.eventDot, { backgroundColor: getEventColor(event, calendars) }]}
                 />
-                <Text style={styles.eventTime}>{formatEventTime(event)}</Text>
+                <Text style={styles.eventTime}>{formatEventTime(event, t)}</Text>
                 <View style={styles.eventInfo}>
                   <Text style={styles.eventTitle} numberOfLines={1}>
-                    {event.title || '(no title)'}
+                    {event.title || t('contacts.activity.no_title', '(No title)')}
                   </Text>
                   <Text style={styles.eventDate}>
                     {formatRelativeDate(event.utcStart || event.start)}
diff --git a/src/components/contacts/ContactImportSheet.tsx b/src/components/contacts/ContactImportSheet.tsx
index 8cdde32a..e7d04db1 100644
--- a/src/components/contacts/ContactImportSheet.tsx
+++ b/src/components/contacts/ContactImportSheet.tsx
@@ -12,6 +12,7 @@ import { useContactsStore } from '../../stores/contacts-store';
 import Button from '../Button';
 import { spacing, radius, typography, type ThemePalette } from '../../theme/tokens';
 import { useColors } from '../../theme/colors';
+import { useLocaleStore } from '../../stores/locale-store';
 
 // expo-document-picker is loaded lazily on first use; its native module is not
 // linked into every build (matches the FilesScreen upload flow).
@@ -43,6 +44,7 @@ export default function ContactImportSheet({
   const c = useColors();
   const styles = React.useMemo(() => makeStyles(c), [c]);
   const insets = useSafeAreaInsets();
+  const t = useLocaleStore((s) => s.t);
   const existing = useContactsStore((s) => s.contacts);
   const importContacts = useContactsStore((s) => s.importContacts);
 
@@ -94,14 +96,14 @@ export default function ContactImportSheet({
     try {
       res = await picker.getDocumentAsync({ copyToCacheDirectory: true, multiple: false });
     } catch (e) {
-      setError(e instanceof Error ? e.message : 'Could not open the file picker');
+      setError(e instanceof Error ? e.message : t('contacts.import.picker_failed', 'Could not open the file picker'));
       return;
     }
     if (res.canceled || res.assets.length === 0) return;
     const asset = res.assets[0];
 
     if (asset.size && asset.size > 5 * 1024 * 1024) {
-      setError('That file is too large (max 5 MB).');
+      setError(t('contacts.import.file_too_large', 'File is too large (max 5 MB)'));
       return;
     }
 
@@ -109,7 +111,7 @@ export default function ContactImportSheet({
       const text = await FileSystem.readAsStringAsync(asset.uri);
       const contacts = parseVCard(text);
       if (contacts.length === 0) {
-        setError('No contacts were found in that file.');
+        setError(t('contacts.import.no_contacts', 'No contacts found in file'));
         return;
       }
       const dupes = detectDuplicates(existing, contacts);
@@ -119,7 +121,7 @@ export default function ContactImportSheet({
       setDuplicates(dupes);
       setSelected(initial);
     } catch (e) {
-      setError(e instanceof Error ? e.message : 'Could not read or parse that file.');
+      setError(e instanceof Error ? e.message : t('contacts.import.parse_error', 'Failed to parse vCard file'));
     }
   };
 
@@ -137,7 +139,10 @@ export default function ContactImportSheet({
 
   const doImport = async () => {
     if (!targetBookId) {
-      Alert.alert('No address book', 'Create an address book before importing contacts.');
+      Alert.alert(
+        t('contacts.detail.no_address_book', 'No address book'),
+        t('contacts.import.no_address_book', 'Create an address book before importing contacts.'),
+      );
       return;
     }
     const toImport = parsed.filter((_, i) => selected.has(i));
@@ -148,7 +153,7 @@ export default function ContactImportSheet({
       setResult(outcome);
       onImported?.(outcome.imported);
     } catch (e) {
-      setError(e instanceof Error ? e.message : 'Import failed.');
+      setError(e instanceof Error ? e.message : t('contacts.import.failed', 'Import failed'));
     } finally {
       setImporting(false);
     }
@@ -162,8 +167,14 @@ export default function ContactImportSheet({
       <Animated.View style={[styles.sheet, { transform: [{ translateY: slideY }] }]}>
         <SafeAreaView edges={['bottom']} style={{ flex: 1 }}>
           <View style={styles.header}>
-            <Text style={styles.title}>Import contacts</Text>
-            <Pressable onPress={onClose} hitSlop={8} style={styles.close}>
+            <Text style={styles.title}>{t('contacts.import.title', 'Import Contacts')}</Text>
+            <Pressable
+              onPress={onClose}
+              hitSlop={8}
+              style={styles.close}
+              accessibilityRole="button"
+              accessibilityLabel={t('contacts.import.close', 'Close')}
+            >
               <X size={20} color={c.text} />
             </Pressable>
           </View>
@@ -174,21 +185,25 @@ export default function ContactImportSheet({
                 <Check size={26} color={c.primaryForeground} />
               </View>
               <Text style={styles.successText}>
-                Imported {result.imported} contact{result.imported === 1 ? '' : 's'}.
+                {t('contacts.import.success', '{count, plural, one {1 contact imported} other {# contacts imported}}', { count: result.imported })}
               </Text>
               {result.failed > 0 && (
                 <Text style={[styles.successText, { color: c.error }]}>
-                  {result.failed} contact{result.failed === 1 ? '' : 's'} could not be imported.
+                  {t(
+                    'contacts.import.failed_count',
+                    '{count, plural, one {# contact could not be imported.} other {# contacts could not be imported.}}',
+                    { count: result.failed },
+                  )}
                 </Text>
               )}
-              <Button variant="outline" size="sm" onPress={onClose}>Done</Button>
+              <Button variant="outline" size="sm" onPress={onClose}>{t('common.done', 'Done')}</Button>
             </View>
           ) : parsed.length === 0 ? (
             <View style={styles.center}>
-              <Pressable style={styles.dropZone} onPress={() => { void pickFile(); }}>
+              <Pressable style={styles.dropZone} onPress={() => { void pickFile(); }} accessibilityRole="button">
                 <Upload size={32} color={c.textMuted} />
-                <Text style={styles.dropTitle}>Choose a vCard file</Text>
-                <Text style={styles.dropHint}>.vcf / .vcard — single or multiple contacts</Text>
+                <Text style={styles.dropTitle}>{t('contacts.import.choose_file_mobile', 'Choose a vCard file')}</Text>
+                <Text style={styles.dropHint}>{t('contacts.import.file_types', '.vcf or .vcard files')}</Text>
               </Pressable>
               {!!error && (
                 <View style={styles.errorBox}>
@@ -203,24 +218,29 @@ export default function ContactImportSheet({
                 style={styles.targetRow}
                 onPress={onChangeTarget}
                 disabled={!onChangeTarget}
+                accessibilityRole={onChangeTarget ? 'button' : undefined}
               >
                 <BookUser size={16} color={c.textSecondary} />
                 <Text style={styles.targetText} numberOfLines={1}>
-                  Import into {targetBookName || 'address book'}
+                  {targetBookName
+                    ? t('contacts.import.into_named', 'Import into {name}', { name: targetBookName })
+                    : t('contacts.import.into_address_book', 'Import into address book')}
                 </Text>
-                {onChangeTarget && <Text style={styles.targetChange}>Change</Text>}
+                {onChangeTarget && <Text style={styles.targetChange}>{t('contacts.import.change_target', 'Change')}</Text>}
               </Pressable>
 
               <View style={styles.toolbar}>
                 <Text style={styles.toolbarCount}>
-                  {parsed.length} found · {selected.size} selected
+                  {t('contacts.import.found', '{count, plural, one {1 contact found} other {# contacts found}}', { count: parsed.length })}
+                  {' · '}
+                  {t('contacts.import.selected', '{count, plural, one {1 selected} other {# selected}}', { count: selected.size })}
                 </Text>
                 <View style={{ flexDirection: 'row', gap: spacing.md }}>
-                  <Pressable onPress={selectAll} hitSlop={6}>
-                    <Text style={styles.link}>All</Text>
+                  <Pressable onPress={selectAll} hitSlop={6} accessibilityRole="button">
+                    <Text style={styles.link}>{t('contacts.import.select_all', 'Select all')}</Text>
                   </Pressable>
-                  <Pressable onPress={selectNone} hitSlop={6}>
-                    <Text style={styles.link}>None</Text>
+                  <Pressable onPress={selectNone} hitSlop={6} accessibilityRole="button">
+                    <Text style={styles.link}>{t('contacts.import.deselect_all', 'Deselect all')}</Text>
                   </Pressable>
                 </View>
               </View>
@@ -236,6 +256,8 @@ export default function ContactImportSheet({
                       key={idx}
                       onPress={() => toggle(idx)}
                       style={({ pressed }) => [styles.row, pressed && styles.rowPressed]}
+                      accessibilityRole="checkbox"
+                      accessibilityState={{ checked: isSelected }}
                     >
                       <View style={[styles.checkbox, isSelected && styles.checkboxOn]}>
                         {isSelected && <Check size={13} color={c.primaryForeground} />}
@@ -248,7 +270,7 @@ export default function ContactImportSheet({
                         )}
                       </View>
                       {isDupe && (
-                        <Text style={styles.dupeBadge}>Duplicate</Text>
+                        <Text style={styles.dupeBadge}>{t('contacts.import.duplicate', 'Duplicate')}</Text>
                       )}
                     </Pressable>
                   );
@@ -263,13 +285,15 @@ export default function ContactImportSheet({
               )}
 
               <View style={[styles.footer, { paddingBottom: Math.max(insets.bottom, spacing.md) }]}>
-                <Button variant="outline" onPress={onClose} disabled={importing}>Cancel</Button>
+                <Button variant="outline" onPress={onClose} disabled={importing}>{t('common.cancel', 'Cancel')}</Button>
                 <Button
                   onPress={() => { void doImport(); }}
                   disabled={importing || selected.size === 0}
                   icon={importing ? <ActivityIndicator size="small" color={c.primaryForeground} /> : undefined}
                 >
-                  {importing ? 'Importing…' : `Import ${selected.size}`}
+                  {importing
+                    ? t('contacts.import.importing', 'Importing...')
+                    : t('contacts.import.import_count', 'Import {count}', { count: selected.size })}
                 </Button>
               </View>
             </>
diff --git a/src/components/contacts/ContactListRow.tsx b/src/components/contacts/ContactListRow.tsx
index aed1245b..b1e7853e 100644
--- a/src/components/contacts/ContactListRow.tsx
+++ b/src/components/contacts/ContactListRow.tsx
@@ -12,6 +12,7 @@ import {
 import SenderAvatar from '../SenderAvatar';
 import { spacing, radius, typography, componentSizes, type ThemePalette } from '../../theme/tokens';
 import { useColors } from '../../theme/colors';
+import { useLocaleStore } from '../../stores/locale-store';
 
 interface ContactListRowProps {
   contact: ContactCard;
@@ -32,7 +33,8 @@ export default function ContactListRow({
 }: ContactListRowProps) {
   const c = useColors();
   const styles = React.useMemo(() => makeStyles(c), [c]);
-  const name = getContactDisplayName(contact) || 'Unnamed';
+  const t = useLocaleStore((s) => s.t);
+  const name = getContactDisplayName(contact) || t('contacts.unnamed', 'Unnamed');
   const email = getContactPrimaryEmail(contact);
   const org = getPrimaryOrg(contact);
   const photoUri = getContactPhotoUri(contact);
@@ -45,6 +47,8 @@ export default function ContactListRow({
     <Pressable
       onPress={onPress}
       onLongPress={onLongPress}
+      accessibilityRole={selectionMode ? 'checkbox' : 'button'}
+      accessibilityState={selectionMode ? { checked: !!selected } : undefined}
       style={({ pressed }) => [
         styles.row,
         pressed && styles.rowPressed,
diff --git a/src/components/contacts/ContactPickerSheet.tsx b/src/components/contacts/ContactPickerSheet.tsx
index 49e5a8de..62828edd 100644
--- a/src/components/contacts/ContactPickerSheet.tsx
+++ b/src/components/contacts/ContactPickerSheet.tsx
@@ -15,6 +15,7 @@ import ContactListRow from './ContactListRow';
 import { useSheetDrag } from '../../lib/use-sheet-drag';
 import { spacing, radius, typography, componentSizes, type ThemePalette } from '../../theme/tokens';
 import { useColors } from '../../theme/colors';
+import { useLocaleStore } from '../../stores/locale-store';
 
 interface Props {
   visible: boolean;
@@ -26,9 +27,10 @@ interface Props {
 }
 
 export default function ContactPickerSheet({
-  visible, onClose, onSelect, title = 'Add Contact', excludedIds, multi = true,
+  visible, onClose, onSelect, title, excludedIds, multi = true,
 }: Props) {
   const c = useColors();
+  const t = useLocaleStore((s) => s.t);
   const styles = React.useMemo(() => makeStyles(c), [c]);
   const allContacts = useContactsStore((s) => s.contacts);
   const sorted = React.useMemo(
@@ -104,18 +106,27 @@ export default function ContactPickerSheet({
               <View style={styles.handle} />
             </View>
             <View style={styles.header}>
-              <Pressable onPress={onClose} style={styles.headerBtn} hitSlop={8}>
+              <Pressable
+                onPress={onClose}
+                style={styles.headerBtn}
+                hitSlop={8}
+                accessibilityRole="button"
+                accessibilityLabel={t('common.close', 'Close')}
+              >
                 <X size={20} color={c.text} />
               </Pressable>
-              <Text style={styles.headerTitle}>{title}</Text>
+              <Text style={styles.headerTitle}>{title ?? t('contacts.picker.title', 'Add Contact')}</Text>
               {multi && (
                 <Pressable
                   onPress={confirm}
                   disabled={selected.size === 0}
                   style={[styles.doneBtn, selected.size === 0 && styles.doneBtnDisabled]}
                   hitSlop={8}
+                  accessibilityRole="button"
                 >
-                  <Text style={styles.doneLabel}>Add{selected.size > 0 ? ` (${selected.size})` : ''}</Text>
+                  <Text style={styles.doneLabel}>
+                    {t('contacts.picker.add_count', '{count, plural, =0 {Add} other {Add (#)}}', { count: selected.size })}
+                  </Text>
                 </Pressable>
               )}
             </View>
@@ -125,14 +136,19 @@ export default function ContactPickerSheet({
             <Search size={16} color={c.textMuted} />
             <TextInput
               style={styles.searchInput}
-              placeholder="Search contacts..."
+              placeholder={t('contacts.search_placeholder', 'Search contacts...')}
               placeholderTextColor={c.textMuted}
               value={query}
               onChangeText={setQuery}
               autoFocus
             />
             {query.length > 0 && (
-              <Pressable onPress={() => setQuery('')} hitSlop={8}>
+              <Pressable
+                onPress={() => setQuery('')}
+                hitSlop={8}
+                accessibilityRole="button"
+                accessibilityLabel={t('contacts.clear_search', 'Clear search')}
+              >
                 <X size={16} color={c.textMuted} />
               </Pressable>
             )}
@@ -152,7 +168,7 @@ export default function ContactPickerSheet({
             ItemSeparatorComponent={() => <View style={styles.separator} />}
             ListEmptyComponent={
               <View style={styles.empty}>
-                <Text style={styles.emptyText}>No contacts match</Text>
+                <Text style={styles.emptyText}>{t('contacts.empty_search', 'No contacts match your search')}</Text>
               </View>
             }
             keyboardShouldPersistTaps="handled"
diff --git a/src/components/contacts/ContactsSidebarDrawer.tsx b/src/components/contacts/ContactsSidebarDrawer.tsx
index c6254ba1..68be926b 100644
--- a/src/components/contacts/ContactsSidebarDrawer.tsx
+++ b/src/components/contacts/ContactsSidebarDrawer.tsx
@@ -17,6 +17,7 @@ import {
 import { getContactDisplayName, getContactKeywords, isGroup } from '../../lib/contact-utils';
 import { spacing, radius, typography, componentSizes, type ThemePalette } from '../../theme/tokens';
 import { useColors } from '../../theme/colors';
+import { useLocaleStore } from '../../stores/locale-store';
 
 type Nav = NativeStackNavigationProp<RootStackParamList>;
 
@@ -37,6 +38,7 @@ export default function ContactsSidebarDrawer({ visible, onClose }: Props) {
   const c = useColors();
   const styles = React.useMemo(() => makeStyles(c), [c]);
   const navigation = useNavigation<Nav>();
+  const t = useLocaleStore((s) => s.t);
   const selectedCategory = useContactsStore((s) => s.selectedCategory);
   const setSelectedCategory = useContactsStore((s) => s.setSelectedCategory);
   const contacts = useContactsStore((s) => s.contacts);
@@ -140,7 +142,7 @@ export default function ContactsSidebarDrawer({ visible, onClose }: Props) {
       await renameKeyword(from, to);
       setRenaming(null);
     } catch (err) {
-      Alert.alert('Rename failed', err instanceof Error ? err.message : 'Unknown error');
+      Alert.alert(t('contacts.category_rename_failed', 'Failed to rename category'), err instanceof Error ? err.message : t('identities.validation_errors.unknown_error', 'Unknown error'));
     } finally {
       setRenameBusy(false);
     }
@@ -152,7 +154,7 @@ export default function ContactsSidebarDrawer({ visible, onClose }: Props) {
       icon={<BookUser size={16} color={c.textSecondary} />}
       label={book.name}
       count={book.count}
-      badge={book.isDefault ? 'Default' : undefined}
+      badge={book.isDefault ? t('contacts.address_books.default', 'Default') : undefined}
       active={isSameCategory(selectedCategory, { type: 'addressBook', addressBookId: book.id })}
       onPress={() => select({ type: 'addressBook', addressBookId: book.id })}
     />
@@ -167,23 +169,29 @@ export default function ContactsSidebarDrawer({ visible, onClose }: Props) {
       <Animated.View style={[styles.drawer, { transform: [{ translateX: slideX }] }]}>
         <SafeAreaView style={styles.drawerSafe} edges={['top', 'bottom', 'left']}>
           <View style={styles.header}>
-            <Pressable onPress={onClose} style={styles.headerClose} hitSlop={8}>
+            <Pressable
+              onPress={onClose}
+              style={styles.headerClose}
+              hitSlop={8}
+              accessibilityRole="button"
+              accessibilityLabel={t('common.close', 'Close')}
+            >
               <X size={20} color={c.text} />
             </Pressable>
-            <Text style={styles.headerTitle}>Contacts</Text>
+            <Text style={styles.headerTitle}>{t('contacts.title', 'Contacts')}</Text>
           </View>
 
           <ScrollView style={styles.scroll} contentContainerStyle={styles.scrollContent}>
             <CategoryRow
               icon={<Inbox size={16} color={c.primary} />}
-              label="All Contacts"
+              label={t('contacts.all_contacts', 'All Contacts')}
               count={totalCount}
               active={selectedCategory.type === 'all'}
               onPress={() => select({ type: 'all' })}
             />
 
             <SectionHeader
-              label="Address Books"
+              label={t('contacts.address_books.title', 'My Address Books')}
               expanded={expanded.books}
               onPress={() => setExpanded((e) => ({ ...e, books: !e.books }))}
             />
@@ -192,7 +200,7 @@ export default function ContactsSidebarDrawer({ visible, onClose }: Props) {
             {sharedSections.map((section) => (
               <React.Fragment key={section.accountId}>
                 <SectionHeader
-                  label={`Shared from ${section.name}`}
+                  label={t('contacts.address_books.shared_prefix', 'Shared: {name}', { name: section.name })}
                   icon={<Share2 size={12} color={c.textMuted} />}
                   expanded={expanded.shared}
                   onPress={() => setExpanded((e) => ({ ...e, shared: !e.shared }))}
@@ -202,7 +210,7 @@ export default function ContactsSidebarDrawer({ visible, onClose }: Props) {
             ))}
 
             <SectionHeader
-              label="Groups"
+              label={t('contacts.tabs.groups', 'Groups')}
               expanded={expanded.groups}
               onPress={() => setExpanded((e) => ({ ...e, groups: !e.groups }))}
             />
@@ -210,7 +218,7 @@ export default function ContactsSidebarDrawer({ visible, onClose }: Props) {
               <CategoryRow
                 key={g.id}
                 icon={<Users size={16} color={c.textSecondary} />}
-                label={getContactDisplayName(g) || 'Group'}
+                label={getContactDisplayName(g) || t('contacts.group', 'Group')}
                 count={memberCountByGroup.get(g.id) ?? 0}
                 active={isSameCategory(selectedCategory, { type: 'group', groupId: g.id })}
                 onPress={() => select({ type: 'group', groupId: g.id })}
@@ -219,7 +227,7 @@ export default function ContactsSidebarDrawer({ visible, onClose }: Props) {
             {expanded.groups && (
               <CategoryRow
                 icon={<Plus size={16} color={c.primary} />}
-                label="New group"
+                label={t('contacts.groups.create', 'New Group')}
                 count={0}
                 active={false}
                 muted
@@ -235,7 +243,7 @@ export default function ContactsSidebarDrawer({ visible, onClose }: Props) {
             )}
 
             <SectionHeader
-              label="Tags"
+              label={t('sidebar.tags', 'Tags')}
               expanded={expanded.tags}
               onPress={() => setExpanded((e) => ({ ...e, tags: !e.tags }))}
             />
@@ -252,10 +260,22 @@ export default function ContactsSidebarDrawer({ visible, onClose }: Props) {
                     onSubmitEditing={() => { void commitRename(); }}
                     placeholderTextColor={c.textMuted}
                   />
-                  <Pressable onPress={() => { void commitRename(); }} hitSlop={6} style={styles.renameBtn}>
+                  <Pressable
+                    onPress={() => { void commitRename(); }}
+                    hitSlop={6}
+                    style={styles.renameBtn}
+                    accessibilityRole="button"
+                    accessibilityLabel={t('common.save', 'Save')}
+                  >
                     <Check size={16} color={c.primary} />
                   </Pressable>
-                  <Pressable onPress={() => setRenaming(null)} hitSlop={6} style={styles.renameBtn}>
+                  <Pressable
+                    onPress={() => setRenaming(null)}
+                    hitSlop={6}
+                    style={styles.renameBtn}
+                    accessibilityRole="button"
+                    accessibilityLabel={t('common.cancel', 'Cancel')}
+                  >
                     <X size={16} color={c.textMuted} />
                   </Pressable>
                 </View>
@@ -277,14 +297,14 @@ export default function ContactsSidebarDrawer({ visible, onClose }: Props) {
             {expanded.tags && (
               <CategoryRow
                 icon={<Tag size={16} color={c.textMuted} />}
-                label="No category"
+                label={t('contacts.no_category', 'No Category')}
                 count={uncategorizedCount}
                 active={selectedCategory.type === 'uncategorized'}
                 onPress={() => select({ type: 'uncategorized' })}
               />
             )}
             {expanded.tags && keywords.length > 0 && (
-              <Text style={styles.hint}>Long-press a tag to rename it</Text>
+              <Text style={styles.hint}>{t('contacts.rename_tag_hint_mobile', 'Long-press a tag to rename it')}</Text>
             )}
           </ScrollView>
         </SafeAreaView>
@@ -304,7 +324,12 @@ function SectionHeader({
   const c = useColors();
   const styles = React.useMemo(() => makeStyles(c), [c]);
   return (
-    <Pressable style={styles.sectionHeader} onPress={onPress}>
+    <Pressable
+      style={styles.sectionHeader}
+      onPress={onPress}
+      accessibilityRole="button"
+      accessibilityState={{ expanded }}
+    >
       {expanded ? (
         <ChevronDown size={14} color={c.textMuted} />
       ) : (
@@ -334,6 +359,8 @@ function CategoryRow({
     <Pressable
       onPress={onPress}
       onLongPress={onLongPress}
+      accessibilityRole="button"
+      accessibilityState={{ selected: active }}
       style={({ pressed }) => [
         styles.row,
         active && styles.rowActive,
diff --git a/src/components/contacts/TagAssignSheet.tsx b/src/components/contacts/TagAssignSheet.tsx
index b1486f3d..27fdc07c 100644
--- a/src/components/contacts/TagAssignSheet.tsx
+++ b/src/components/contacts/TagAssignSheet.tsx
@@ -8,6 +8,7 @@ import { spacing, radius, typography, componentSizes, type ThemePalette } from '
 import { useColors } from '../../theme/colors';
 import { useSheetDrag } from '../../lib/use-sheet-drag';
 import { useContactsStore, selectKeywordsUsed } from '../../stores/contacts-store';
+import { useLocaleStore } from '../../stores/locale-store';
 
 interface Props {
   visible: boolean;
@@ -18,9 +19,10 @@ interface Props {
 }
 
 export default function TagAssignSheet({
-  visible, onClose, onPick, title = 'Add tag',
+  visible, onClose, onPick, title,
 }: Props) {
   const c = useColors();
+  const t = useLocaleStore((s) => s.t);
   const styles = React.useMemo(() => makeStyles(c), [c]);
   const insets = useSafeAreaInsets();
   // Subscribe to the stable `contacts` array and derive the keyword list in a
@@ -73,8 +75,14 @@ export default function TagAssignSheet({
             <View style={styles.handle} />
           </View>
           <View style={styles.header}>
-            <Text style={styles.title}>{title}</Text>
-            <Pressable onPress={onClose} hitSlop={8} style={styles.close}>
+            <Text style={styles.title}>{title ?? t('contacts.bulk.add_tag', 'Add tag')}</Text>
+            <Pressable
+              onPress={onClose}
+              hitSlop={8}
+              style={styles.close}
+              accessibilityRole="button"
+              accessibilityLabel={t('common.close', 'Close')}
+            >
               <X size={18} color={c.textSecondary} />
             </Pressable>
           </View>
@@ -83,7 +91,7 @@ export default function TagAssignSheet({
         <View style={styles.inputRow}>
           <TextInput
             style={styles.input}
-            placeholder="New tag name"
+            placeholder={t('contacts.tag_name_placeholder', 'New tag name')}
             placeholderTextColor={c.textMuted}
             value={input}
             onChangeText={setInput}
@@ -96,6 +104,8 @@ export default function TagAssignSheet({
             disabled={!input.trim()}
             style={[styles.addBtn, !input.trim() && styles.addBtnDisabled]}
             hitSlop={6}
+            accessibilityRole="button"
+            accessibilityLabel={t('common.add', 'Add')}
           >
             <Plus size={16} color={c.primaryForeground} />
           </Pressable>
@@ -103,13 +113,14 @@ export default function TagAssignSheet({
 
         <ScrollView keyboardShouldPersistTaps="handled">
           {keywords.length === 0 ? (
-            <Text style={styles.empty}>No tags yet. Type one above.</Text>
+            <Text style={styles.empty}>{t('contacts.no_tags_hint', 'No tags yet. Type one above.')}</Text>
           ) : (
             keywords.map((kw) => (
               <Pressable
                 key={kw.keyword}
                 onPress={() => onPick(kw.keyword)}
                 style={({ pressed }) => [styles.row, pressed && styles.rowPressed]}
+                accessibilityRole="button"
               >
                 <Tag size={16} color={c.textSecondary} />
                 <Text style={styles.rowLabel} numberOfLines={1}>{kw.keyword}</Text>
diff --git a/src/screens/ContactDetailScreen.tsx b/src/screens/ContactDetailScreen.tsx
index c0f8fa33..b1fcdfca 100644
--- a/src/screens/ContactDetailScreen.tsx
+++ b/src/screens/ContactDetailScreen.tsx
@@ -31,6 +31,7 @@ import { ContactActivity } from '../components/contacts/ContactActivity';
 import AddressBookPickerSheet from '../components/contacts/AddressBookPickerSheet';
 import { spacing, radius, typography, type ThemePalette } from '../theme/tokens';
 import { useColors } from '../theme/colors';
+import { useLocaleStore, type TranslateFn } from '../stores/locale-store';
 
 type Nav = NativeStackNavigationProp<RootStackParamList, 'ContactDetail'>;
 type Route = RouteProp<RootStackParamList, 'ContactDetail'>;
@@ -42,6 +43,55 @@ function formatTimestamp(s: string | undefined): string {
   return d.toLocaleDateString(undefined, { year: 'numeric', month: 'short', day: 'numeric' });
 }
 
+// JSContact stores contexts, phone features and personal-info kinds as
+// English keys; show the known ones in the UI language.
+function contextLabel(key: string, t: TranslateFn): string {
+  switch (key) {
+    case 'work': return t('contacts.form.context_work', 'Work');
+    case 'private': return t('contacts.form.context_private', 'Private');
+    default: return key;
+  }
+}
+
+function phoneFeatureLabel(key: string, t: TranslateFn): string {
+  switch (key) {
+    case 'voice': return t('contacts.form.phone_voice', 'Voice');
+    case 'cell': return t('contacts.form.phone_cell', 'Mobile');
+    case 'fax': return t('contacts.form.phone_fax', 'Fax');
+    case 'pager': return t('contacts.form.phone_pager', 'Pager');
+    case 'video': return t('contacts.form.phone_video', 'Video');
+    case 'text': return t('contacts.form.phone_text', 'Text');
+    default: return key;
+  }
+}
+
+function personalInfoLabel(kind: string, level: string | undefined, t: TranslateFn): string {
+  const kindLabel =
+    kind === 'hobby' ? t('contacts.detail.personal_hobby', 'Hobby')
+    : kind === 'expertise' ? t('contacts.detail.personal_expertise', 'Expertise')
+    : kind === 'interest' ? t('contacts.detail.personal_interest', 'Interest')
+    : kind === 'other' ? t('contacts.detail.personal_other', 'Other')
+    : kind;
+  if (!level) return kindLabel;
+  const levelLabel =
+    level === 'low' ? t('contacts.form.level_low', 'Low')
+    : level === 'medium' ? t('contacts.form.level_medium', 'Medium')
+    : level === 'high' ? t('contacts.form.level_high', 'High')
+    : level;
+  return `${kindLabel} · ${levelLabel}`;
+}
+
+function genderLabel(value: string, t: TranslateFn): string {
+  switch (value) {
+    case 'masculine': return t('contacts.detail.gender_masculine', 'Male');
+    case 'feminine': return t('contacts.detail.gender_feminine', 'Female');
+    case 'other': return t('contacts.detail.gender_other', 'Other');
+    case 'none': return t('contacts.detail.gender_none', 'Not applicable');
+    case 'unknown': return t('contacts.detail.gender_unknown', 'Unknown');
+    default: return value;
+  }
+}
+
 function buildAddressLines(a: {
   components?: Array<{ kind: string; value: string }>;
   full?: string;
@@ -79,6 +129,7 @@ export default function ContactDetailScreen() {
   const styles = React.useMemo(() => makeStyles(c), [c]);
   const navigation = useNavigation<Nav>();
   const route = useRoute<Route>();
+  const t = useLocaleStore((s) => s.t);
   const { contactId } = route.params;
 
   const contact = useContactsStore((s) => s.contacts.find((c) => c.id === contactId));
@@ -99,19 +150,27 @@ export default function ContactDetailScreen() {
     return (
       <SafeAreaView style={styles.container}>
         <View style={styles.header}>
-          <Pressable onPress={() => navigation.goBack()} style={styles.headerBtn} hitSlop={8}>
+          <Pressable
+            onPress={() => navigation.goBack()}
+            style={styles.headerBtn}
+            hitSlop={8}
+            accessibilityRole="button"
+            accessibilityLabel={t('common.back', 'Back')}
+          >
             <ArrowLeft size={22} color={c.text} />
           </Pressable>
-          <Text style={styles.headerTitle}>Contact</Text>
+          <Text style={styles.headerTitle}>{t('contacts.contact', 'Contact')}</Text>
         </View>
         <View style={styles.missing}>
-          <Text style={styles.missingText}>Contact not found</Text>
+          <Text style={styles.missingText}>{t('contacts.detail.not_found', 'Contact not found')}</Text>
         </View>
       </SafeAreaView>
     );
   }
 
-  const name = getContactDisplayName(contact) || 'Unnamed';
+  const name = getContactDisplayName(contact) || t('contacts.unnamed', 'Unnamed');
+  const ctx = (contexts?: Record<string, boolean>): string[] =>
+    getActiveContexts(contexts).map((k) => contextLabel(k, t));
   const nickname = contact.nicknames
     ? Object.values(contact.nicknames).map((n) => n.name).filter(Boolean).join(', ')
     : getPrimaryNickname(contact);
@@ -168,20 +227,20 @@ export default function ContactDetailScreen() {
     });
   };
   const openTel = (num: string) => {
-    Linking.openURL(`tel:${num}`).catch(() => Alert.alert('Cannot open dialer'));
+    Linking.openURL(`tel:${num}`).catch(() => Alert.alert(t('contacts.detail.open_dialer_failed', 'Cannot open dialer')));
   };
   const openSms = (num: string) => {
-    Linking.openURL(`sms:${num}`).catch(() => Alert.alert('Cannot open messaging app'));
+    Linking.openURL(`sms:${num}`).catch(() => Alert.alert(t('contacts.detail.open_sms_failed', 'Cannot open messaging app')));
   };
   const openMap = (query: string) => {
     const encoded = encodeURIComponent(query);
-    Linking.openURL(`https://maps.google.com/?q=${encoded}`).catch(() => Alert.alert('Cannot open maps'));
+    Linking.openURL(`https://maps.google.com/?q=${encoded}`).catch(() => Alert.alert(t('contacts.detail.open_maps_failed', 'Cannot open maps')));
   };
   const openUrl = (uri: string) => {
     // Contact data is server-supplied: only hand http(s)/mailto/tel/sms/geo
     // schemes to the OS, never intent:// / file:// / third-party deep links.
     void openExternalUrl(uri).then((opened) => {
-      if (!opened) Alert.alert('Cannot open link');
+      if (!opened) Alert.alert(t('contacts.detail.open_link_failed', 'Cannot open link'));
     });
   };
   const shareValue = (value: string) => {
@@ -194,7 +253,7 @@ export default function ContactDetailScreen() {
       await deleteContact(contact.id);
       navigation.goBack();
     } catch (err) {
-      Alert.alert('Delete failed', err instanceof Error ? err.message : 'Unknown error');
+      Alert.alert(t('contacts.toast.error_delete', 'Failed to delete contact'), err instanceof Error ? err.message : t('identities.validation_errors.unknown_error', 'Unknown error'));
     }
   };
 
@@ -208,7 +267,7 @@ export default function ContactDetailScreen() {
         await Sharing.shareAsync(path, {
           mimeType: 'text/vcard',
           UTI: 'public.vcard',
-          dialogTitle: `Share ${name}`,
+          dialogTitle: t('contacts.detail.share_title', 'Share {name}', { name }),
         });
       } else {
         await Share.share({ message: vcard });
@@ -221,7 +280,10 @@ export default function ContactDetailScreen() {
   const doDuplicate = async () => {
     const targetBookId = bookIds[0] || addressBooks[0]?.id;
     if (!targetBookId) {
-      Alert.alert('No address book', 'Cannot duplicate without an address book.');
+      Alert.alert(
+        t('contacts.detail.no_address_book', 'No address book'),
+        t('contacts.detail.duplicate_no_book', 'Cannot duplicate without an address book.'),
+      );
       return;
     }
     // Drop the UID too: the copy gets a fresh one on create, otherwise group
@@ -239,8 +301,7 @@ export default function ContactDetailScreen() {
       ...rest
     } = contact;
     const baseName =
-      (rest.name?.full ? `${rest.name.full} (Copy)` : null) ??
-      `${name} (Copy)`;
+      t('contacts.detail.copy_name', '{name} (Copy)', { name: rest.name?.full || name });
     const draft: Partial<ContactCard> = {
       ...rest,
       name: rest.name ? { ...rest.name, full: baseName } : { full: baseName },
@@ -249,7 +310,7 @@ export default function ContactDetailScreen() {
       const created = await createContact(draft, targetBookId);
       navigation.replace('ContactDetail', { contactId: created.id });
     } catch (err) {
-      Alert.alert('Duplicate failed', err instanceof Error ? err.message : 'Unknown error');
+      Alert.alert(t('contacts.detail.duplicate_failed', 'Duplicate failed'), err instanceof Error ? err.message : t('identities.validation_errors.unknown_error', 'Unknown error'));
     }
   };
 
@@ -258,35 +319,35 @@ export default function ContactDetailScreen() {
     try {
       await moveContactsToAddressBook([contact.id], bookId);
     } catch (err) {
-      Alert.alert('Move failed', err instanceof Error ? err.message : 'Unknown error');
+      Alert.alert(t('contacts.address_books.move_failed', 'Failed to move contact'), err instanceof Error ? err.message : t('identities.validation_errors.unknown_error', 'Unknown error'));
     }
   };
 
   const moreItems = [
     !isGroup(contact) && {
       icon: <Copy size={16} color={c.text} />,
-      label: 'Duplicate',
+      label: t('contacts.context_menu.duplicate', 'Duplicate'),
       onPress: () => { void doDuplicate(); },
     },
     !isGroup(contact) && {
       icon: <Users size={16} color={c.text} />,
-      label: 'Add to group',
+      label: t('contacts.context_menu.add_to_group', 'Add to group'),
       onPress: () => setGroupPickerOpen(true),
     },
     addressBooks.length > 0 && {
       icon: <FolderInput size={16} color={c.text} />,
-      label: 'Move to address book',
+      label: t('contacts.bulk.move_to_address_book', 'Move to address book'),
       onPress: () => setMoveOpen(true),
     },
     {
       icon: <Share2 size={16} color={c.text} />,
-      label: 'Export vCard',
+      label: t('contacts.context_menu.export_vcard', 'Export as vCard'),
       onPress: () => { void doShare(); },
     },
     { separator: true },
     {
       icon: <Trash2 size={16} color={c.error} />,
-      label: 'Delete',
+      label: t('contacts.context_menu.delete', 'Delete'),
       onPress: () => setConfirmDelete(true),
       destructive: true,
     },
@@ -295,17 +356,25 @@ export default function ContactDetailScreen() {
   return (
     <SafeAreaView style={styles.container} edges={['top']}>
       <View style={styles.header}>
-        <Pressable onPress={() => navigation.goBack()} style={styles.headerBtn} hitSlop={8}>
+        <Pressable
+          onPress={() => navigation.goBack()}
+          style={styles.headerBtn}
+          hitSlop={8}
+          accessibilityRole="button"
+          accessibilityLabel={t('common.back', 'Back')}
+        >
           <ArrowLeft size={22} color={c.text} />
         </Pressable>
         <Text style={styles.headerTitle} numberOfLines={1}>
-          {isGroup(contact) ? 'Group' : 'Contact'}
+          {isGroup(contact) ? t('contacts.group', 'Group') : t('contacts.contact', 'Contact')}
         </Text>
         <View style={styles.headerActions}>
           <Pressable
             onPress={() => navigation.navigate('ContactForm', { contactId: contact.id })}
             style={styles.headerBtn}
             hitSlop={8}
+            accessibilityRole="button"
+            accessibilityLabel={t('contacts.context_menu.edit', 'Edit')}
           >
             <Pencil size={18} color={c.text} />
           </Pressable>
@@ -313,6 +382,8 @@ export default function ContactDetailScreen() {
             onPress={() => setMoreOpen(true)}
             style={styles.headerBtn}
             hitSlop={8}
+            accessibilityRole="button"
+            accessibilityLabel={t('contacts.detail.more_actions', 'More actions')}
           >
             <MoreHorizontal size={20} color={c.text} />
           </Pressable>
@@ -332,33 +403,35 @@ export default function ContactDetailScreen() {
             <Text style={styles.heroSubtitle}>{subtitleParts.join(' · ')}</Text>
           )}
           {isGroup(contact) && groupMembersCount > 0 && (
-            <Text style={styles.heroSubtitle}>{groupMembersCount} member{groupMembersCount === 1 ? '' : 's'}</Text>
+            <Text style={styles.heroSubtitle}>
+              {t('contacts.groups.member_count', '{count, plural, =0 {No members} one {1 member} other {# members}}', { count: groupMembersCount })}
+            </Text>
           )}
         </View>
 
         <View style={styles.quickActions}>
           {!!email && (
-            <QuickAction icon={<Mail size={18} color={c.primary} />} label="Email" onPress={() => openMail(email)} />
+            <QuickAction icon={<Mail size={18} color={c.primary} />} label={t('contacts.detail.email_default_label', 'Email')} onPress={() => openMail(email)} />
           )}
           {!!phone && (
-            <QuickAction icon={<Phone size={18} color={c.primary} />} label="Call" onPress={() => openTel(phone)} />
+            <QuickAction icon={<Phone size={18} color={c.primary} />} label={t('contacts.context_menu.call', 'Call')} onPress={() => openTel(phone)} />
           )}
           {!!phone && (
-            <QuickAction icon={<MessageSquare size={18} color={c.primary} />} label="SMS" onPress={() => openSms(phone)} />
+            <QuickAction icon={<MessageSquare size={18} color={c.primary} />} label={t('contacts.detail.sms', 'SMS')} onPress={() => openSms(phone)} />
           )}
           <QuickAction
             icon={<Share2 size={18} color={c.primary} />}
-            label="Share"
+            label={t('contacts.detail.share', 'Share')}
             onPress={() => { void doShare(); }}
           />
         </View>
 
         <View style={styles.sections}>
           {emails.length > 0 && (
-            <Section icon={<Mail size={16} color={c.textMuted} />} label="Email">
+            <Section icon={<Mail size={16} color={c.textMuted} />} label={t('contacts.detail.email_default_label', 'Email')}>
               {emails.map((e) => {
                 const ctxLabel =
-                  e.label || getActiveContexts(e.contexts).join(', ') || undefined;
+                  e.label || ctx(e.contexts).join(', ') || undefined;
                 return (
                   <DetailRow key={e.id} label={ctxLabel}>
                     <Pressable
@@ -374,12 +447,12 @@ export default function ContactDetailScreen() {
           )}
 
           {phones.length > 0 && (
-            <Section icon={<Phone size={16} color={c.textMuted} />} label="Phone">
+            <Section icon={<Phone size={16} color={c.textMuted} />} label={t('contacts.detail.phone_default_label', 'Phone')}>
               {phones.map((p) => {
-                const features = getPhoneFeatures(p.features);
+                const features = getPhoneFeatures(p.features).map((f) => phoneFeatureLabel(f, t));
                 const labelParts = [
                   p.label,
-                  ...getActiveContexts(p.contexts),
+                  ...ctx(p.contexts),
                   ...features,
                 ].filter(Boolean) as string[];
                 return (
@@ -392,7 +465,13 @@ export default function ContactDetailScreen() {
                       >
                         <Text style={styles.linkText}>{p.number}</Text>
                       </Pressable>
-                      <Pressable onPress={() => openSms(p.number)} hitSlop={6} style={styles.smallActionBtn}>
+                      <Pressable
+                        onPress={() => openSms(p.number)}
+                        hitSlop={6}
+                        style={styles.smallActionBtn}
+                        accessibilityRole="button"
+                        accessibilityLabel={t('contacts.detail.sms', 'SMS')}
+                      >
                         <MessageSquare size={14} color={c.textMuted} />
                       </Pressable>
                     </View>
@@ -403,11 +482,11 @@ export default function ContactDetailScreen() {
           )}
 
           {addresses.length > 0 && (
-            <Section icon={<MapPin size={16} color={c.textMuted} />} label="Address">
+            <Section icon={<MapPin size={16} color={c.textMuted} />} label={t('contacts.detail.address_default_label', 'Address')}>
               {addresses.map((a) => {
                 const lines = buildAddressLines(a);
                 const formatted = formatAddress(a);
-                const ctxLabel = getActiveContexts(a.contexts).join(', ') || a.label;
+                const ctxLabel = ctx(a.contexts).join(', ') || a.label;
                 return (
                   <DetailRow key={a.id} label={ctxLabel}>
                     <Pressable
@@ -418,7 +497,7 @@ export default function ContactDetailScreen() {
                         <Text key={idx} style={styles.value}>{line}</Text>
                       ))}
                       {!!a.timeZone && (
-                        <Text style={styles.subValue}>Timezone: {a.timeZone}</Text>
+                        <Text style={styles.subValue}>{t('contacts.detail.timezone_value', 'Timezone: {zone}', { zone: a.timeZone })}</Text>
                       )}
                     </Pressable>
                   </DetailRow>
@@ -428,9 +507,9 @@ export default function ContactDetailScreen() {
           )}
 
           {(orgs.length > 0 || titles.length > 0) && (
-            <Section icon={<Building size={16} color={c.textMuted} />} label="Work">
+            <Section icon={<Building size={16} color={c.textMuted} />} label={t('contacts.detail.section_work', 'Work')}>
               {orgs.map((o, i) => (
-                <DetailRow key={`org-${i}`} label="Organization">
+                <DetailRow key={`org-${i}`} label={t('contacts.detail.organization_label', 'Organization')}>
                   <Text style={styles.value}>{o.name}</Text>
                   {!!(o.units && o.units.length) && (
                     <Text style={styles.subValue}>{o.units.map((u) => u.name).join(', ')}</Text>
@@ -438,12 +517,12 @@ export default function ContactDetailScreen() {
                 </DetailRow>
               ))}
               {jobTitles.map((tl, i) => (
-                <DetailRow key={`title-${i}`} label="Title">
+                <DetailRow key={`title-${i}`} label={t('contacts.detail.title_label', 'Title')}>
                   <Text style={styles.value}>{tl.name}</Text>
                 </DetailRow>
               ))}
               {roles.map((r, i) => (
-                <DetailRow key={`role-${i}`} label="Role">
+                <DetailRow key={`role-${i}`} label={t('contacts.detail.role_label', 'Role')}>
                   <Text style={styles.value}>{r.name}</Text>
                 </DetailRow>
               ))}
@@ -451,20 +530,20 @@ export default function ContactDetailScreen() {
           )}
 
           {(anniversaries.length > 0 || hasGender || preferredLanguages.length > 0 || personalInfo.length > 0) && (
-            <Section icon={<Heart size={16} color={c.textMuted} />} label="Personal">
+            <Section icon={<Heart size={16} color={c.textMuted} />} label={t('contacts.detail.section_personal', 'Personal')}>
               {anniversaries.map((a, i) => {
                 const years = getCompletedYears(a.date);
                 const suffix =
                   years !== null
                     ? a.kind === 'birth'
-                      ? ` · age ${years}`
-                      : ` · ${years} year${years === 1 ? '' : 's'} ago`
+                      ? ` · ${t('contacts.detail.age_years', '{count, plural, one {1 year old} other {# years old}}', { count: years })}`
+                      : ` · ${t('contacts.detail.years_since', '{count, plural, one {1 year} other {# years}}', { count: years })}`
                     : '';
                 const kindLabel =
-                  a.kind === 'birth' ? 'Birthday'
-                  : a.kind === 'wedding' ? 'Anniversary'
-                  : a.kind === 'death' ? 'Memorial'
-                  : 'Other';
+                  a.kind === 'birth' ? t('contacts.detail.anniversary_birth', 'Birthday')
+                  : a.kind === 'wedding' ? t('contacts.detail.anniversary_wedding', 'Anniversary')
+                  : a.kind === 'death' ? t('contacts.form.anniversary_death', 'Memorial')
+                  : t('contacts.detail.anniversary_other', 'Other');
                 return (
                   <DetailRow key={`an-${i}`} label={kindLabel} icon={<Cake size={14} color={c.textMuted} />}>
                     <Text style={styles.value}>{formatPartialDate(a.date)}{suffix}</Text>
@@ -472,16 +551,19 @@ export default function ContactDetailScreen() {
                 );
               })}
               {hasGender && (
-                <DetailRow label="Gender" icon={<UserCircle size={14} color={c.textMuted} />}>
+                <DetailRow label={t('contacts.detail.gender', 'Gender')} icon={<UserCircle size={14} color={c.textMuted} />}>
                   <Text style={styles.value}>
-                    {[contact.speakToAs?.grammaticalGender, firstPronoun].filter(Boolean).join(' · ')}
+                    {[
+                      contact.speakToAs?.grammaticalGender && genderLabel(contact.speakToAs.grammaticalGender, t),
+                      firstPronoun,
+                    ].filter(Boolean).join(' · ')}
                   </Text>
                 </DetailRow>
               )}
               {preferredLanguages.map((lang, i) => (
                 <DetailRow
                   key={`lg-${i}`}
-                  label={getActiveContexts(lang.contexts).join(', ') || 'Language'}
+                  label={ctx(lang.contexts).join(', ') || t('contacts.detail.language_label', 'Language')}
                   icon={<Languages size={14} color={c.textMuted} />}
                 >
                   <Text style={styles.value}>{lang.language}</Text>
@@ -490,7 +572,7 @@ export default function ContactDetailScreen() {
               {personalInfo.map((pi, i) => (
                 <DetailRow
                   key={`pi-${i}`}
-                  label={`${pi.kind}${pi.level ? ` · ${pi.level}` : ''}`}
+                  label={personalInfoLabel(pi.kind, pi.level, t)}
                 >
                   <Text style={styles.value}>{pi.value}</Text>
                 </DetailRow>
@@ -499,9 +581,9 @@ export default function ContactDetailScreen() {
           )}
 
           {onlineServices.length > 0 && (
-            <Section icon={<Globe size={16} color={c.textMuted} />} label="Online">
+            <Section icon={<Globe size={16} color={c.textMuted} />} label={t('contacts.detail.online_service_default_label', 'Online')}>
               {onlineServices.map((s, i) => {
-                const labelParts = [s.service, ...getActiveContexts(s.contexts)].filter(Boolean) as string[];
+                const labelParts = [s.service, ...ctx(s.contexts)].filter(Boolean) as string[];
                 const isHttp = typeof s.uri === 'string' && /^https?:/i.test(s.uri);
                 return (
                   <DetailRow key={`os-${i}`} label={labelParts.join(' · ') || undefined}>
@@ -518,23 +600,23 @@ export default function ContactDetailScreen() {
           )}
 
           {(contact.calendarUri || contact.schedulingUri || contact.freeBusyUri) && (
-            <Section icon={<CalendarIcon size={16} color={c.textMuted} />} label="Calendar">
+            <Section icon={<CalendarIcon size={16} color={c.textMuted} />} label={t('contacts.detail.calendar', 'Calendar')}>
               {!!contact.calendarUri && (
-                <DetailRow label="Calendar">
+                <DetailRow label={t('contacts.detail.calendar_uri', 'Calendar URL')}>
                   <Pressable onPress={() => openUrl(contact.calendarUri!)}>
                     <Text style={[styles.value, styles.linkText]} numberOfLines={2}>{contact.calendarUri}</Text>
                   </Pressable>
                 </DetailRow>
               )}
               {!!contact.schedulingUri && (
-                <DetailRow label="Scheduling">
+                <DetailRow label={t('contacts.detail.scheduling_uri', 'Scheduling URL')}>
                   <Pressable onPress={() => openUrl(contact.schedulingUri!)}>
                     <Text style={[styles.value, styles.linkText]} numberOfLines={2}>{contact.schedulingUri}</Text>
                   </Pressable>
                 </DetailRow>
               )}
               {!!contact.freeBusyUri && (
-                <DetailRow label="Free/Busy">
+                <DetailRow label={t('contacts.detail.freebusy_uri', 'Free/Busy URL')}>
                   <Pressable onPress={() => openUrl(contact.freeBusyUri!)}>
                     <Text style={[styles.value, styles.linkText]} numberOfLines={2}>{contact.freeBusyUri}</Text>
                   </Pressable>
@@ -544,9 +626,9 @@ export default function ContactDetailScreen() {
           )}
 
           {cryptoKeys.length > 0 && (
-            <Section icon={<KeyRound size={16} color={c.textMuted} />} label="Crypto Keys">
+            <Section icon={<KeyRound size={16} color={c.textMuted} />} label={t('contacts.detail.crypto_keys', 'Crypto Keys')}>
               {cryptoKeys.map((key, i) => (
-                <DetailRow key={`ck-${i}`} label={getActiveContexts(key.contexts).join(', ') || key.mediaType}>
+                <DetailRow key={`ck-${i}`} label={ctx(key.contexts).join(', ') || key.mediaType}>
                   <Text style={styles.value} numberOfLines={3}>
                     {typeof key.uri === 'string'
                       ? `${key.uri.substring(0, 80)}${key.uri.length > 80 ? '…' : ''}`
@@ -558,7 +640,7 @@ export default function ContactDetailScreen() {
           )}
 
           {keywords.length > 0 && (
-            <Section icon={<Tag size={16} color={c.textMuted} />} label="Categories">
+            <Section icon={<Tag size={16} color={c.textMuted} />} label={t('contacts.detail.categories', 'Categories')}>
               <View style={styles.chipRow}>
                 {keywords.map((kw) => (
                   <View key={kw} style={styles.tagChip}>
@@ -570,7 +652,7 @@ export default function ContactDetailScreen() {
           )}
 
           {relatedTo.length > 0 && (
-            <Section icon={<Users size={16} color={c.textMuted} />} label="Related">
+            <Section icon={<Users size={16} color={c.textMuted} />} label={t('contacts.detail.related_default_label', 'Related')}>
               {relatedTo.map(([uri, rel], i) => {
                 const relType = rel.relation
                   ? Object.keys(rel.relation).find((k) => rel.relation![k])
@@ -585,7 +667,7 @@ export default function ContactDetailScreen() {
           )}
 
           {memberContacts.length > 0 && (
-            <Section icon={<Users size={16} color={c.textMuted} />} label={`Members (${memberContacts.length})`}>
+            <Section icon={<Users size={16} color={c.textMuted} />} label={t('contacts.groups.members_with_count', 'Members ({count})', { count: memberContacts.length })}>
               {memberContacts.map((m) => (
                 <Pressable
                   key={m.id}
@@ -609,7 +691,7 @@ export default function ContactDetailScreen() {
           )}
 
           {notes.length > 0 && (
-            <Section icon={<FileText size={16} color={c.textMuted} />} label="Notes">
+            <Section icon={<FileText size={16} color={c.textMuted} />} label={t('contacts.detail.notes', 'Notes')}>
               {notes.map((n, i) => (
                 <Text key={i} style={styles.noteText}>{n.note}</Text>
               ))}
@@ -617,7 +699,7 @@ export default function ContactDetailScreen() {
           )}
 
           {bookNames.length > 0 && (
-            <Section icon={<BookUser size={16} color={c.textMuted} />} label="Address Book">
+            <Section icon={<BookUser size={16} color={c.textMuted} />} label={t('contacts.address_books.address_book', 'Address Book')}>
               {bookNames.map((n, i) => (
                 <Text key={i} style={styles.value}>{n}</Text>
               ))}
@@ -630,9 +712,9 @@ export default function ContactDetailScreen() {
             <View style={styles.metaRow}>
               <Clock size={12} color={c.textMuted} />
               <Text style={styles.metaText}>
-                {contact.created && `Created ${formatTimestamp(contact.created)}`}
+                {contact.created && t('contacts.detail.created_on', 'Created {date}', { date: formatTimestamp(contact.created) })}
                 {contact.created && contact.updated && '   ·   '}
-                {contact.updated && `Updated ${formatTimestamp(contact.updated)}`}
+                {contact.updated && t('contacts.detail.updated_on', 'Updated {date}', { date: formatTimestamp(contact.updated) })}
               </Text>
             </View>
           )}
@@ -641,10 +723,12 @@ export default function ContactDetailScreen() {
 
       <Dialog
         visible={confirmDelete}
-        title={isGroup(contact) ? 'Delete group' : 'Delete contact'}
-        message={`Are you sure you want to delete "${name}"? This cannot be undone.`}
+        title={isGroup(contact)
+          ? t('contacts.groups.delete_confirm_title', 'Delete group')
+          : t('contacts.delete_confirm_title', 'Delete contact')}
+        message={t('files.delete_confirm_message', 'Are you sure you want to delete "{name}"? This cannot be undone.', { name })}
         variant="destructive"
-        confirmText="Delete"
+        confirmText={t('contacts.context_menu.delete', 'Delete')}
         onConfirm={doDelete}
         onCancel={() => setConfirmDelete(false)}
       />
@@ -661,17 +745,17 @@ export default function ContactDetailScreen() {
         items={[
           ...groups.map((g): MoreItem => ({
             icon: <Users size={16} color={c.text} />,
-            label: getContactDisplayName(g) || 'Group',
+            label: getContactDisplayName(g) || t('contacts.group', 'Group'),
             onPress: () => {
               addContactsToGroup(g.id, [contact.id]).catch((err) => {
-                Alert.alert('Add to group failed', err instanceof Error ? err.message : 'Unknown error');
+                Alert.alert(t('contacts.detail.add_to_group_failed', 'Add to group failed'), err instanceof Error ? err.message : t('identities.validation_errors.unknown_error', 'Unknown error'));
               });
             },
           })),
           ...(groups.length > 0 ? [{ separator: true } as MoreItem] : []),
           {
             icon: <Plus size={16} color={c.text} />,
-            label: 'New group…',
+            label: t('contacts.groups.create_ellipsis', 'New group…'),
             onPress: () => navigation.navigate('ContactForm', { asGroup: true, memberIds: [contact.id] }),
           },
         ]}
@@ -736,6 +820,7 @@ function MoreActionsSheet({
               <Pressable
                 key={i}
                 onPress={() => { it.onPress(); onClose(); }}
+                accessibilityRole="button"
                 style={({ pressed }) => [styles.sheetItem, pressed && styles.sheetItemPressed]}
               >
                 {it.icon}
@@ -803,7 +888,11 @@ function QuickAction({
   const c = useColors();
   const styles = React.useMemo(() => makeStyles(c), [c]);
   return (
-    <Pressable style={({ pressed }) => [styles.quickBtn, pressed && styles.quickBtnPressed]} onPress={onPress}>
+    <Pressable
+      style={({ pressed }) => [styles.quickBtn, pressed && styles.quickBtnPressed]}
+      onPress={onPress}
+      accessibilityRole="button"
+    >
       <View style={styles.quickIcon}>{icon}</View>
       <Text style={styles.quickLabel}>{label}</Text>
     </Pressable>
diff --git a/src/screens/ContactFormScreen.tsx b/src/screens/ContactFormScreen.tsx
index 5815fb8f..1d3cec1b 100644
--- a/src/screens/ContactFormScreen.tsx
+++ b/src/screens/ContactFormScreen.tsx
@@ -30,6 +30,7 @@ import Dialog from '../components/Dialog';
 import ContactPickerSheet from '../components/contacts/ContactPickerSheet';
 import { spacing, radius, typography, componentSizes, type ThemePalette } from '../theme/tokens';
 import { useColors } from '../theme/colors';
+import { useLocaleStore, type TranslateFn } from '../stores/locale-store';
 
 type Nav = NativeStackNavigationProp<RootStackParamList, 'ContactForm'>;
 type Route = RouteProp<RootStackParamList, 'ContactForm'>;
@@ -482,58 +483,57 @@ function formToPatch(
   return patch as Partial<ContactCard>;
 }
 
-const EMAIL_CONTEXTS: Array<{ value: string; label: string }> = [
-  { value: '', label: 'None' },
-  { value: 'work', label: 'Work' },
-  { value: 'private', label: 'Private' },
-];
-const PHONE_CONTEXTS = EMAIL_CONTEXTS;
-const ADDRESS_CONTEXTS: Array<{ value: string; label: string }> = [
-  { value: '', label: 'None' },
-  { value: 'work', label: 'Work' },
-  { value: 'private', label: 'Private' },
-];
-const PHONE_FEATURES: Array<{ value: string; label: string }> = [
-  { value: '', label: 'Phone' },
-  { value: 'voice', label: 'Voice' },
-  { value: 'cell', label: 'Mobile' },
-  { value: 'fax', label: 'Fax' },
-  { value: 'pager', label: 'Pager' },
-  { value: 'video', label: 'Video' },
-  { value: 'text', label: 'Text' },
-];
-const ANNIVERSARY_KINDS: Array<{ value: string; label: string }> = [
-  { value: 'birth', label: 'Birthday' },
-  { value: 'wedding', label: 'Anniversary' },
-  { value: 'death', label: 'Memorial' },
-  { value: 'other', label: 'Other' },
-];
-const PERSONAL_INFO_KINDS: Array<{ value: string; label: string }> = [
-  { value: 'hobby', label: 'Hobby' },
-  { value: 'expertise', label: 'Expertise' },
-  { value: 'interest', label: 'Interest' },
-  { value: 'other', label: 'Other' },
-];
-const PERSONAL_INFO_LEVELS: Array<{ value: string; label: string }> = [
-  { value: '', label: '–' },
-  { value: 'low', label: 'Low' },
-  { value: 'medium', label: 'Medium' },
-  { value: 'high', label: 'High' },
-];
-// Same vocabulary as the webmail form and the vCard SEX mapping
-// (M/F/O/N/U), so a card renders the same value in both apps.
-const GENDER_OPTIONS: Array<{ value: string; label: string }> = [
-  { value: '', label: 'Unspecified' },
-  { value: 'masculine', label: 'Masculine' },
-  { value: 'feminine', label: 'Feminine' },
-  { value: 'other', label: 'Other' },
-  { value: 'none', label: 'None' },
-  { value: 'unknown', label: 'Unknown' },
-];
-const KIND_OPTIONS: Array<{ value: string; label: string }> = [
-  { value: 'person', label: 'Person' },
-  { value: 'org', label: 'Organization' },
-];
+type Option = { value: string; label: string };
+
+function formOptions(t: TranslateFn) {
+  const contexts: Option[] = [
+    { value: '', label: t('contacts.form.context_none', 'None') },
+    { value: 'work', label: t('contacts.form.context_work', 'Work') },
+    { value: 'private', label: t('contacts.form.context_private', 'Private') },
+  ];
+  const phoneFeatures: Option[] = [
+    { value: '', label: t('contacts.form.phone', 'Phone') },
+    { value: 'voice', label: t('contacts.form.phone_voice', 'Voice') },
+    { value: 'cell', label: t('contacts.form.phone_cell', 'Mobile') },
+    { value: 'fax', label: t('contacts.form.phone_fax', 'Fax') },
+    { value: 'pager', label: t('contacts.form.phone_pager', 'Pager') },
+    { value: 'video', label: t('contacts.form.phone_video', 'Video') },
+    { value: 'text', label: t('contacts.form.phone_text', 'Text') },
+  ];
+  const anniversaryKinds: Option[] = [
+    { value: 'birth', label: t('contacts.form.anniversary_birth', 'Birthday') },
+    { value: 'wedding', label: t('contacts.form.anniversary_wedding', 'Anniversary') },
+    { value: 'death', label: t('contacts.form.anniversary_death', 'Memorial') },
+    { value: 'other', label: t('contacts.form.anniversary_other', 'Other') },
+  ];
+  const personalInfoKinds: Option[] = [
+    { value: 'hobby', label: t('contacts.form.personal_hobby', 'Hobby') },
+    { value: 'expertise', label: t('contacts.form.personal_expertise', 'Expertise') },
+    { value: 'interest', label: t('contacts.form.personal_interest', 'Interest') },
+    { value: 'other', label: t('contacts.form.personal_other', 'Other') },
+  ];
+  const personalInfoLevels: Option[] = [
+    { value: '', label: '–' },
+    { value: 'low', label: t('contacts.form.level_low', 'Low') },
+    { value: 'medium', label: t('contacts.form.level_medium', 'Medium') },
+    { value: 'high', label: t('contacts.form.level_high', 'High') },
+  ];
+  // Same vocabulary as the webmail form and the vCard SEX mapping
+  // (M/F/O/N/U), so a card renders the same value in both apps.
+  const gender: Option[] = [
+    { value: '', label: t('contacts.form.gender_unspecified', 'Unspecified') },
+    { value: 'masculine', label: t('contacts.form.gender_male', 'Male') },
+    { value: 'feminine', label: t('contacts.form.gender_female', 'Female') },
+    { value: 'other', label: t('contacts.form.gender_other', 'Other') },
+    { value: 'none', label: t('contacts.form.gender_none', 'Not applicable') },
+    { value: 'unknown', label: t('contacts.form.gender_unknown', 'Unknown') },
+  ];
+  const kind: Option[] = [
+    { value: 'person', label: t('contacts.form.type_person', 'Person') },
+    { value: 'org', label: t('contacts.form.type_organization', 'Organization') },
+  ];
+  return { contexts, phoneFeatures, anniversaryKinds, personalInfoKinds, personalInfoLevels, gender, kind };
+}
 
 const MAX_PHOTO_DIM = 512;
 const PHOTO_QUALITY = 0.85;
@@ -588,6 +588,8 @@ function Pills({
             key={o.value}
             onPress={() => onChange(o.value)}
             style={[styles.pill, active && styles.pillActive]}
+            accessibilityRole="button"
+            accessibilityState={{ selected: active }}
           >
             <Text style={[styles.pillText, active && styles.pillTextActive]}>{o.label}</Text>
           </Pressable>
@@ -618,6 +620,8 @@ function Section({
         onPress={() => collapsible && setOpen((o) => !o)}
         style={styles.sectionHeader}
         disabled={!collapsible}
+        accessibilityRole={collapsible ? 'button' : 'header'}
+        accessibilityState={collapsible ? { expanded: isOpen } : undefined}
       >
         <View style={styles.sectionIcon}>{icon}</View>
         <Text style={styles.sectionLabel}>{label}</Text>
@@ -651,10 +655,17 @@ function RemovableRow({
 }) {
   const c = useColors();
   const styles = React.useMemo(() => makeStyles(c), [c]);
+  const t = useLocaleStore((s) => s.t);
   return (
     <View style={styles.removableRow}>
       <View style={{ flex: 1 }}>{children}</View>
-      <Pressable onPress={onRemove} hitSlop={8} style={styles.removeBtn}>
+      <Pressable
+        onPress={onRemove}
+        hitSlop={8}
+        style={styles.removeBtn}
+        accessibilityRole="button"
+        accessibilityLabel={t('common.remove', 'Remove')}
+      >
         <XIcon size={14} color={c.textMuted} />
       </Pressable>
     </View>
@@ -665,7 +676,11 @@ function AddButton({ onPress, label }: { onPress: () => void; label: string }) {
   const c = useColors();
   const styles = React.useMemo(() => makeStyles(c), [c]);
   return (
-    <Pressable onPress={onPress} style={({ pressed }) => [styles.addBtn, pressed && styles.addBtnPressed]}>
+    <Pressable
+      onPress={onPress}
+      style={({ pressed }) => [styles.addBtn, pressed && styles.addBtnPressed]}
+      accessibilityRole="button"
+    >
       <Plus size={14} color={c.primary} />
       <Text style={styles.addBtnLabel}>{label}</Text>
     </Pressable>
@@ -677,6 +692,8 @@ export default function ContactFormScreen() {
   const styles = React.useMemo(() => makeStyles(c), [c]);
   const navigation = useNavigation<Nav>();
   const route = useRoute<Route>();
+  const t = useLocaleStore((s) => s.t);
+  const opts = React.useMemo(() => formOptions(t), [t]);
   const { contactId, addressBookId: initialBook, asGroup, prefill, memberIds: initialMemberIds } = route.params || {};
   const isEdit = !!contactId;
 
@@ -753,12 +770,18 @@ export default function ContactFormScreen() {
     const orgName = form.orgs[0]?.name.trim() || '';
     if (asGroup) {
       if (!form.given.trim()) {
-        Alert.alert('Missing info', 'Give the group a name.');
+        Alert.alert(
+          t('contacts.form.missing_info', 'Missing info'),
+          t('contacts.groups.name_required', 'Group name is required'),
+        );
         return;
       }
     } else if (form.isOrg) {
       if (!orgName) {
-        Alert.alert('Missing info', 'Add the organization name.');
+        Alert.alert(
+          t('contacts.form.missing_info', 'Missing info'),
+          t('contacts.form.org_name_required', 'Add the organization name.'),
+        );
         return;
       }
     } else {
@@ -766,18 +789,27 @@ export default function ContactFormScreen() {
       const hasEmail = form.emails.some((e) => e.address.trim());
       // An organization name identifies the card just as well as a personal name.
       if (!hasName && !hasEmail && !orgName) {
-        Alert.alert('Missing info', 'Add a name or at least one email.');
+        Alert.alert(
+          t('contacts.form.missing_info', 'Missing info'),
+          t('contacts.form.name_or_email_required', 'Add a name or at least one email.'),
+        );
         return;
       }
     }
     if (!form.addressBookId) {
-      Alert.alert('Missing address book', 'Select an address book to save this contact.');
+      Alert.alert(
+        t('contacts.form.missing_address_book', 'Missing address book'),
+        t('contacts.form.address_book_required', 'Select an address book to save this contact.'),
+      );
       return;
     }
     // Email validity
     for (const e of form.emails) {
       if (e.address.trim() && !/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(e.address.trim())) {
-        Alert.alert('Invalid email', `"${e.address}" is not a valid email address.`);
+        Alert.alert(
+          t('contacts.form.invalid_email_title', 'Invalid email'),
+          t('contacts.form.invalid_email_message', '"{address}" is not a valid email address.', { address: e.address }),
+        );
         return;
       }
     }
@@ -785,7 +817,14 @@ export default function ContactFormScreen() {
     // free text, and a rejected date used to take the whole card with it.
     for (const a of form.anniversaries) {
       if (a.date.trim() && !stringToPartialDate(a.date)) {
-        Alert.alert('Invalid date', `"${a.date}" is not a date. Use YYYY-MM-DD, YYYY-MM, YYYY or --MM-DD.`);
+        Alert.alert(
+          t('contacts.form.invalid_date_title', 'Invalid date'),
+          t(
+            'contacts.form.invalid_date_message',
+            '"{date}" is not a date. Use YYYY-MM-DD, YYYY-MM, YYYY or --MM-DD.',
+            { date: a.date },
+          ),
+        );
         return;
       }
     }
@@ -801,15 +840,23 @@ export default function ContactFormScreen() {
         else navigation.replace('ContactDetail', { contactId: created.id });
       }
     } catch (err) {
-      Alert.alert('Save failed', err instanceof Error ? err.message : 'Unknown error');
+      Alert.alert(
+        asGroup
+          ? t('contacts.groups.save_failed', 'Failed to save group')
+          : t('contacts.form.save_failed', 'Failed to save contact'),
+        err instanceof Error ? err.message : t('identities.validation_errors.unknown_error', 'Unknown error'),
+      );
     } finally {
       setSaving(false);
     }
   };
 
+  const existingName = existing ? getContactDisplayName(existing) : '';
   const headerTitle = isEdit
-    ? `Edit ${existing ? getContactDisplayName(existing) : asGroup ? 'Group' : 'Contact'}`
-    : asGroup ? 'New Group' : 'New Contact';
+    ? existingName
+      ? t('contacts.form.edit_named', 'Edit {name}', { name: existingName })
+      : asGroup ? t('contacts.groups.edit', 'Edit Group') : t('contacts.form.edit_title', 'Edit Contact')
+    : asGroup ? t('contacts.groups.create', 'New Group') : t('contacts.form.create_title', 'New Contact');
 
   const previewName = form.isOrg
     ? (form.orgs[0]?.name || '').trim()
@@ -818,7 +865,10 @@ export default function ContactFormScreen() {
   const pickPhoto = async () => {
     const perm = await ImagePicker.requestMediaLibraryPermissionsAsync();
     if (!perm.granted) {
-      Alert.alert('Photo access needed', 'Grant photo library permission to pick a contact photo.');
+      Alert.alert(
+        t('contacts.form.photo_permission_title', 'Photo access needed'),
+        t('contacts.form.photo_permission_message', 'Grant photo library permission to pick a contact photo.'),
+      );
       return;
     }
     const result = await ImagePicker.launchImageLibraryAsync({
@@ -842,7 +892,7 @@ export default function ContactFormScreen() {
   const memberIdSet = React.useMemo(() => new Set(form.members), [form.members]);
 
   const addressBookSection = addressBooks.length > 1 && (
-    <Section icon={<Book size={16} color={c.textMuted} />} label="Address Book">
+    <Section icon={<Book size={16} color={c.textMuted} />} label={t('contacts.address_books.address_book', 'Address Book')}>
       <View style={styles.pillRow}>
         {addressBooks.filter((b) => b.myRights?.mayWrite !== false || b.id === form.addressBookId).map((book) => (
           <Pressable
@@ -862,7 +912,7 @@ export default function ContactFormScreen() {
   const notesSection = (
     <Section
       icon={<FileText size={16} color={c.textMuted} />}
-      label="Notes"
+      label={t('contacts.form.note', 'Notes')}
       collapsible
       defaultOpen={form.notes.length > 0}
     >
@@ -873,7 +923,7 @@ export default function ContactFormScreen() {
         >
           <TextInput
             style={[styles.input, styles.multiline]}
-            placeholder="Notes"
+            placeholder={t('contacts.form.note_placeholder', 'Add a note...')}
             placeholderTextColor={c.textMuted}
             multiline
             value={n.note}
@@ -886,7 +936,7 @@ export default function ContactFormScreen() {
         </RemovableRow>
       ))}
       <AddButton
-        label="Add note"
+        label={t('contacts.form.add_note', 'Add note')}
         onPress={() => updateForm('notes', [...form.notes, { note: '' }])}
       />
     </Section>
@@ -895,7 +945,7 @@ export default function ContactFormScreen() {
   const categoriesSection = (
     <Section
       icon={<Tag size={16} color={c.textMuted} />}
-      label="Categories"
+      label={t('contacts.form.categories', 'Categories')}
       collapsible
       defaultOpen={form.keywords.length > 0}
     >
@@ -915,7 +965,7 @@ export default function ContactFormScreen() {
       )}
       <TextInput
         style={styles.input}
-        placeholder="Add tag and press Enter"
+        placeholder={t('contacts.form.categories_placeholder_mobile', 'Add tag and press Enter')}
         placeholderTextColor={c.textMuted}
         value={keywordInput}
         onChangeText={setKeywordInput}
@@ -949,17 +999,31 @@ export default function ContactFormScreen() {
 
   const header = (
     <View style={styles.header}>
-      <Pressable onPress={handleBack} style={styles.headerBtn} hitSlop={8}>
+      <Pressable
+        onPress={handleBack}
+        style={styles.headerBtn}
+        hitSlop={8}
+        accessibilityRole="button"
+        accessibilityLabel={t('common.back', 'Back')}
+      >
         <ArrowLeft size={22} color={c.text} />
       </Pressable>
       <Text style={styles.headerTitle} numberOfLines={1}>{headerTitle}</Text>
-      <Pressable onPress={handleSave} disabled={saving} style={styles.saveBtn} hitSlop={8}>
+      <Pressable
+        onPress={handleSave}
+        disabled={saving}
+        style={styles.saveBtn}
+        hitSlop={8}
+        accessibilityRole="button"
+      >
         {saving ? (
-          <Text style={styles.saveLabel}>Saving…</Text>
+          <Text style={styles.saveLabel}>
+            {isEdit ? t('contacts.form.updating', 'Updating...') : t('contacts.form.creating', 'Creating...')}
+          </Text>
         ) : (
           <>
             <Check size={16} color={c.primaryForeground} />
-            <Text style={styles.saveLabel}>Save</Text>
+            <Text style={styles.saveLabel}>{t('contacts.form.save', 'Save')}</Text>
           </>
         )}
       </Pressable>
@@ -969,10 +1033,10 @@ export default function ContactFormScreen() {
   const discardDialog = (
     <Dialog
       visible={confirmDiscard}
-      title="Discard changes?"
-      message="You have unsaved changes. Discard them?"
+      title={t('settings.discard_changes', 'Discard unsaved changes?')}
+      message={t('settings.unsaved_changes', 'You have unsaved changes')}
       variant="destructive"
-      confirmText="Discard"
+      confirmText={t('settings.discard', 'Discard')}
       onConfirm={() => {
         setConfirmDiscard(false);
         navigation.goBack();
@@ -993,11 +1057,11 @@ export default function ContactFormScreen() {
           <ScrollView contentContainerStyle={styles.scrollContent} keyboardShouldPersistTaps="handled">
             {addressBookSection}
 
-            <Section icon={<Users size={16} color={c.textMuted} />} label="Group">
-              <Field label="Group name">
+            <Section icon={<Users size={16} color={c.textMuted} />} label={t('contacts.group', 'Group')}>
+              <Field label={t('contacts.groups.name_label', 'Group Name')}>
                 <TextInput
                   style={styles.input}
-                  placeholder="Sales team"
+                  placeholder={t('contacts.groups.name_placeholder', 'e.g., Team, Family')}
                   placeholderTextColor={c.textMuted}
                   value={form.given}
                   onChangeText={(v) => updateForm('given', v)}
@@ -1006,7 +1070,7 @@ export default function ContactFormScreen() {
               </Field>
             </Section>
 
-            <Section icon={<User size={16} color={c.textMuted} />} label={`Members (${memberContacts.length})`}>
+            <Section icon={<User size={16} color={c.textMuted} />} label={t('contacts.groups.members_with_count', 'Members ({count})', { count: memberContacts.length })}>
               {memberContacts.map((m) => {
                 const email = getContactPrimaryEmail(m);
                 return (
@@ -1014,12 +1078,12 @@ export default function ContactFormScreen() {
                     key={m.id}
                     onRemove={() => updateForm('members', form.members.filter((id) => id !== m.id))}
                   >
-                    <Text style={styles.memberName} numberOfLines={1}>{getContactDisplayName(m) || 'Unnamed'}</Text>
+                    <Text style={styles.memberName} numberOfLines={1}>{getContactDisplayName(m) || t('contacts.unnamed', 'Unnamed')}</Text>
                     {!!email && <Text style={styles.memberEmail} numberOfLines={1}>{email}</Text>}
                   </RemovableRow>
                 );
               })}
-              <AddButton label="Add members" onPress={() => setMemberPickerOpen(true)} />
+              <AddButton label={t('contacts.groups.add_members', 'Add members')} onPress={() => setMemberPickerOpen(true)} />
             </Section>
 
             {categoriesSection}
@@ -1030,7 +1094,7 @@ export default function ContactFormScreen() {
         <ContactPickerSheet
           visible={memberPickerOpen}
           onClose={() => setMemberPickerOpen(false)}
-          title="Add members"
+          title={t('contacts.groups.add_members', 'Add members')}
           excludedIds={memberIdSet}
           onSelect={(ids) => {
             setMemberPickerOpen(false);
@@ -1055,7 +1119,12 @@ export default function ContactFormScreen() {
         <ScrollView contentContainerStyle={styles.scrollContent} keyboardShouldPersistTaps="handled">
           {/* Photo + Name preview */}
           <View style={styles.photoPanel}>
-            <Pressable onPress={() => { void pickPhoto(); }} style={styles.photoBtn}>
+            <Pressable
+              onPress={() => { void pickPhoto(); }}
+              style={styles.photoBtn}
+              accessibilityRole="button"
+              accessibilityLabel={t('contacts.form.upload_photo', 'Upload photo')}
+            >
               {form.photoUri ? (
                 <Image source={{ uri: form.photoUri }} style={styles.photoThumb} />
               ) : (
@@ -1066,9 +1135,11 @@ export default function ContactFormScreen() {
             </Pressable>
             <View style={{ flex: 1 }}>
               <Text style={styles.previewName} numberOfLines={1}>
-                {previewName || (form.isOrg ? 'New organization' : 'New contact')}
+                {previewName || (form.isOrg
+                  ? t('contacts.form.new_organization', 'New organization')
+                  : t('contacts.create_new', 'New Contact'))}
               </Text>
-              <Text style={styles.previewHint}>Tap photo to choose an image</Text>
+              <Text style={styles.previewHint}>{t('contacts.form.photo_hint_mobile', 'Tap photo to choose an image')}</Text>
               {form.photoUri ? (
                 <Pressable
                   onPress={() => {
@@ -1077,8 +1148,9 @@ export default function ContactFormScreen() {
                   }}
                   style={styles.removePhotoBtn}
                   hitSlop={8}
+                  accessibilityRole="button"
                 >
-                  <Text style={styles.removePhotoLabel}>Remove photo</Text>
+                  <Text style={styles.removePhotoLabel}>{t('contacts.form.remove_photo', 'Remove photo')}</Text>
                 </Pressable>
               ) : null}
             </View>
@@ -1087,10 +1159,10 @@ export default function ContactFormScreen() {
           {addressBookSection}
 
           {/* Identity */}
-          <Section icon={<User size={16} color={c.textMuted} />} label="Identity">
+          <Section icon={<User size={16} color={c.textMuted} />} label={t('contacts.form.section_identity', 'Name & Identity')}>
             <Pills
               value={form.isOrg ? 'org' : 'person'}
-              options={KIND_OPTIONS}
+              options={opts.kind}
               onChange={(v) => {
                 const isOrg = v === 'org';
                 setDirty(true);
@@ -1105,10 +1177,10 @@ export default function ContactFormScreen() {
               }}
             />
             {form.isOrg ? (
-              <Field label="Organization name">
+              <Field label={t('contacts.form.organization', 'Organization')}>
                 <TextInput
                   style={styles.input}
-                  placeholder="Company"
+                  placeholder={t('contacts.form.organization_placeholder', 'Company name')}
                   placeholderTextColor={c.textMuted}
                   value={form.orgs[0]?.name || ''}
                   onChangeText={(v) => {
@@ -1121,58 +1193,58 @@ export default function ContactFormScreen() {
             ) : (
               <>
                 <View style={styles.row2}>
-                  <Field label="Prefix">
+                  <Field label={t('contacts.form.prefix', 'Prefix')}>
                     <TextInput
                       style={styles.input}
-                      placeholder="Mr."
+                      placeholder={t('contacts.form.prefix_placeholder', 'Dr., Mr., Mrs.')}
                       placeholderTextColor={c.textMuted}
                       value={form.prefix}
                       onChangeText={(v) => updateForm('prefix', v)}
                     />
                   </Field>
-                  <Field label="Suffix">
+                  <Field label={t('contacts.form.suffix', 'Suffix')}>
                     <TextInput
                       style={styles.input}
-                      placeholder="Jr."
+                      placeholder={t('contacts.form.suffix_placeholder', 'Jr., Sr., III')}
                       placeholderTextColor={c.textMuted}
                       value={form.suffix}
                       onChangeText={(v) => updateForm('suffix', v)}
                     />
                   </Field>
                 </View>
-                <Field label="First name">
+                <Field label={t('contacts.form.given_name', 'First name')}>
                   <TextInput
                     style={styles.input}
-                    placeholder="First name"
+                    placeholder={t('contacts.form.given_name', 'First name')}
                     placeholderTextColor={c.textMuted}
                     value={form.given}
                     onChangeText={(v) => updateForm('given', v)}
                   />
                 </Field>
-                <Field label="Middle name">
+                <Field label={t('contacts.form.middle_name', 'Middle name')}>
                   <TextInput
                     style={styles.input}
-                    placeholder="Middle"
+                    placeholder={t('contacts.form.middle_name', 'Middle name')}
                     placeholderTextColor={c.textMuted}
                     value={form.middle}
                     onChangeText={(v) => updateForm('middle', v)}
                   />
                 </Field>
-                <Field label="Last name">
+                <Field label={t('contacts.form.surname', 'Last name')}>
                   <TextInput
                     style={styles.input}
-                    placeholder="Last name"
+                    placeholder={t('contacts.form.surname', 'Last name')}
                     placeholderTextColor={c.textMuted}
                     value={form.surname}
                     onChangeText={(v) => updateForm('surname', v)}
                   />
                 </Field>
                 {form.nicknames.map((nick, i) => (
-                  <Field key={i} label={i === 0 ? 'Nickname' : undefined}>
+                  <Field key={i} label={i === 0 ? t('contacts.form.nickname', 'Nickname') : undefined}>
                     <View style={styles.dateInputRow}>
                       <TextInput
                         style={[styles.input, { flex: 1 }]}
-                        placeholder="Nickname"
+                        placeholder={t('contacts.form.nickname_placeholder', 'Nickname')}
                         placeholderTextColor={c.textMuted}
                         value={nick}
                         onChangeText={(v) => {
@@ -1186,6 +1258,8 @@ export default function ContactFormScreen() {
                           onPress={() => updateForm('nicknames', form.nicknames.filter((_, idx) => idx !== i))}
                           hitSlop={8}
                           style={styles.removeBtn}
+                          accessibilityRole="button"
+                          accessibilityLabel={t('common.remove', 'Remove')}
                         >
                           <XIcon size={14} color={c.textMuted} />
                         </Pressable>
@@ -1194,14 +1268,14 @@ export default function ContactFormScreen() {
                   </Field>
                 ))}
                 {form.nicknames.every((n) => n.trim()) && (
-                  <AddButton label="Add nickname" onPress={() => updateForm('nicknames', [...form.nicknames, ''])} />
+                  <AddButton label={t('contacts.form.add_nickname', 'Add nickname')} onPress={() => updateForm('nicknames', [...form.nicknames, ''])} />
                 )}
               </>
             )}
-            <Field label="Display name (optional)">
+            <Field label={t('contacts.form.display_name_optional', 'Display name (optional)')}>
               <TextInput
                 style={styles.input}
-                placeholder="Custom display name"
+                placeholder={t('contacts.form.display_name_placeholder', 'Custom display name')}
                 placeholderTextColor={c.textMuted}
                 value={form.full}
                 onChangeText={(v) => updateForm('full', v)}
@@ -1210,7 +1284,7 @@ export default function ContactFormScreen() {
           </Section>
 
           {/* Email */}
-          <Section icon={<Mail size={16} color={c.textMuted} />} label="Email">
+          <Section icon={<Mail size={16} color={c.textMuted} />} label={t('contacts.form.email', 'Email')}>
             {form.emails.map((e, i) => (
               <RemovableRow
                 key={i}
@@ -1218,7 +1292,7 @@ export default function ContactFormScreen() {
               >
                 <TextInput
                   style={styles.input}
-                  placeholder="email@example.com"
+                  placeholder={t('contacts.form.email_placeholder', 'email@example.com')}
                   placeholderTextColor={c.textMuted}
                   keyboardType="email-address"
                   autoCapitalize="none"
@@ -1231,7 +1305,7 @@ export default function ContactFormScreen() {
                 />
                 <Pills
                   value={e.context}
-                  options={EMAIL_CONTEXTS}
+                  options={opts.contexts}
                   onChange={(v) => {
                     const next = [...form.emails];
                     next[i] = { ...e, context: v };
@@ -1241,13 +1315,13 @@ export default function ContactFormScreen() {
               </RemovableRow>
             ))}
             <AddButton
-              label="Add email"
+              label={t('contacts.form.add_email', 'Add email')}
               onPress={() => updateForm('emails', [...form.emails, { address: '', context: '' }])}
             />
           </Section>
 
           {/* Phone */}
-          <Section icon={<Phone size={16} color={c.textMuted} />} label="Phone">
+          <Section icon={<Phone size={16} color={c.textMuted} />} label={t('contacts.form.phone', 'Phone')}>
             {form.phones.map((p, i) => (
               <RemovableRow
                 key={i}
@@ -1255,7 +1329,7 @@ export default function ContactFormScreen() {
               >
                 <TextInput
                   style={styles.input}
-                  placeholder="+1 555 0100"
+                  placeholder={t('contacts.form.phone_placeholder', '+1 234 567 890')}
                   placeholderTextColor={c.textMuted}
                   keyboardType="phone-pad"
                   value={p.number}
@@ -1267,7 +1341,7 @@ export default function ContactFormScreen() {
                 />
                 <Pills
                   value={p.feature}
-                  options={PHONE_FEATURES}
+                  options={opts.phoneFeatures}
                   onChange={(v) => {
                     const next = [...form.phones];
                     next[i] = { ...p, feature: v };
@@ -1276,7 +1350,7 @@ export default function ContactFormScreen() {
                 />
                 <Pills
                   value={p.context}
-                  options={PHONE_CONTEXTS}
+                  options={opts.contexts}
                   onChange={(v) => {
                     const next = [...form.phones];
                     next[i] = { ...p, context: v };
@@ -1286,7 +1360,7 @@ export default function ContactFormScreen() {
               </RemovableRow>
             ))}
             <AddButton
-              label="Add phone"
+              label={t('contacts.form.add_phone', 'Add phone')}
               onPress={() => updateForm('phones', [...form.phones, { number: '', context: '', feature: '' }])}
             />
           </Section>
@@ -1294,7 +1368,7 @@ export default function ContactFormScreen() {
           {/* Work */}
           <Section
             icon={<Building size={16} color={c.textMuted} />}
-            label="Work"
+            label={t('contacts.form.section_work', 'Work & Organization')}
             collapsible
             defaultOpen={form.orgs.length > 0}
           >
@@ -1304,10 +1378,10 @@ export default function ContactFormScreen() {
                 onRemove={() => updateForm('orgs', form.orgs.filter((_, idx) => idx !== i))}
               >
                 {!(form.isOrg && i === 0) && (
-                  <Field label="Organization">
+                  <Field label={t('contacts.form.organization', 'Organization')}>
                     <TextInput
                       style={styles.input}
-                      placeholder="Company"
+                      placeholder={t('contacts.form.organization_placeholder', 'Company name')}
                       placeholderTextColor={c.textMuted}
                       value={o.name}
                       onChangeText={(v) => {
@@ -1318,10 +1392,10 @@ export default function ContactFormScreen() {
                     />
                   </Field>
                 )}
-                <Field label="Department">
+                <Field label={t('contacts.form.department', 'Department')}>
                   <TextInput
                     style={styles.input}
-                    placeholder="Department"
+                    placeholder={t('contacts.form.department_placeholder', 'Department')}
                     placeholderTextColor={c.textMuted}
                     value={o.department}
                     onChangeText={(v) => {
@@ -1331,10 +1405,10 @@ export default function ContactFormScreen() {
                     }}
                   />
                 </Field>
-                <Field label="Job title">
+                <Field label={t('contacts.form.job_title', 'Job title')}>
                   <TextInput
                     style={styles.input}
-                    placeholder="Title"
+                    placeholder={t('contacts.form.job_title_placeholder', 'e.g., Software Engineer')}
                     placeholderTextColor={c.textMuted}
                     value={o.jobTitle}
                     onChangeText={(v) => {
@@ -1344,10 +1418,10 @@ export default function ContactFormScreen() {
                     }}
                   />
                 </Field>
-                <Field label="Role">
+                <Field label={t('contacts.form.role', 'Role')}>
                   <TextInput
                     style={styles.input}
-                    placeholder="Role"
+                    placeholder={t('contacts.form.role_placeholder', 'e.g., Team Lead')}
                     placeholderTextColor={c.textMuted}
                     value={o.role}
                     onChangeText={(v) => {
@@ -1360,7 +1434,7 @@ export default function ContactFormScreen() {
               </RemovableRow>
             ))}
             <AddButton
-              label="Add organization"
+              label={t('contacts.form.add_organization', 'Add organization')}
               onPress={() => updateForm('orgs', [...form.orgs, { name: '', department: '', jobTitle: '', role: '' }])}
             />
           </Section>
@@ -1368,7 +1442,7 @@ export default function ContactFormScreen() {
           {/* Address */}
           <Section
             icon={<MapPin size={16} color={c.textMuted} />}
-            label="Address"
+            label={t('contacts.detail.address_default_label', 'Address')}
             collapsible
             defaultOpen={form.addresses.length > 0}
           >
@@ -1379,7 +1453,7 @@ export default function ContactFormScreen() {
               >
                 <TextInput
                   style={styles.input}
-                  placeholder="Street"
+                  placeholder={t('contacts.form.street', 'Street')}
                   placeholderTextColor={c.textMuted}
                   value={a.street}
                   onChangeText={(v) => {
@@ -1392,7 +1466,7 @@ export default function ContactFormScreen() {
                   <Field>
                     <TextInput
                       style={styles.input}
-                      placeholder="City"
+                      placeholder={t('contacts.form.city', 'City')}
                       placeholderTextColor={c.textMuted}
                       value={a.locality}
                       onChangeText={(v) => {
@@ -1405,7 +1479,7 @@ export default function ContactFormScreen() {
                   <Field>
                     <TextInput
                       style={styles.input}
-                      placeholder="Region"
+                      placeholder={t('contacts.form.region', 'State / Region')}
                       placeholderTextColor={c.textMuted}
                       value={a.region}
                       onChangeText={(v) => {
@@ -1420,7 +1494,7 @@ export default function ContactFormScreen() {
                   <Field>
                     <TextInput
                       style={styles.input}
-                      placeholder="Postcode"
+                      placeholder={t('contacts.form.postcode', 'Postal code')}
                       placeholderTextColor={c.textMuted}
                       value={a.postcode}
                       onChangeText={(v) => {
@@ -1433,7 +1507,7 @@ export default function ContactFormScreen() {
                   <Field>
                     <TextInput
                       style={styles.input}
-                      placeholder="Country"
+                      placeholder={t('contacts.form.country', 'Country')}
                       placeholderTextColor={c.textMuted}
                       value={a.country}
                       onChangeText={(v) => {
@@ -1446,7 +1520,7 @@ export default function ContactFormScreen() {
                 </View>
                 <Pills
                   value={a.context}
-                  options={ADDRESS_CONTEXTS}
+                  options={opts.contexts}
                   onChange={(v) => {
                     const next = [...form.addresses];
                     next[i] = { ...a, context: v };
@@ -1456,7 +1530,7 @@ export default function ContactFormScreen() {
               </RemovableRow>
             ))}
             <AddButton
-              label="Add address"
+              label={t('contacts.form.add_address', 'Add address')}
               onPress={() =>
                 updateForm('addresses', [...form.addresses, {
                   street: '', locality: '', region: '', postcode: '', country: '', context: '',
@@ -1468,7 +1542,7 @@ export default function ContactFormScreen() {
           {/* Online services */}
           <Section
             icon={<Globe size={16} color={c.textMuted} />}
-            label="Online"
+            label={t('contacts.form.online_services', 'Online Services')}
             collapsible
             defaultOpen={form.online.length > 0}
           >
@@ -1477,10 +1551,10 @@ export default function ContactFormScreen() {
                 key={i}
                 onRemove={() => updateForm('online', form.online.filter((_, idx) => idx !== i))}
               >
-                <Field label="URL">
+                <Field label={t('contacts.form.url', 'URL')}>
                   <TextInput
                     style={styles.input}
-                    placeholder="https://example.com/handle"
+                    placeholder={t('contacts.form.url_placeholder', 'https://...')}
                     placeholderTextColor={c.textMuted}
                     autoCapitalize="none"
                     value={s.uri}
@@ -1492,7 +1566,7 @@ export default function ContactFormScreen() {
                   />
                 </Field>
                 <View style={styles.row2}>
-                  <Field label="Service">
+                  <Field label={t('contacts.form.service_placeholder', 'Service')}>
                     <TextInput
                       style={styles.input}
                       placeholder="LinkedIn, Mastodon, …"
@@ -1505,10 +1579,10 @@ export default function ContactFormScreen() {
                       }}
                     />
                   </Field>
-                  <Field label="Label">
+                  <Field label={t('contacts.form.label', 'Label')}>
                     <TextInput
                       style={styles.input}
-                      placeholder="Work, Personal, …"
+                      placeholder={t('contacts.form.label_placeholder', 'Work, Personal, …')}
                       placeholderTextColor={c.textMuted}
                       value={s.label}
                       onChangeText={(v) => {
@@ -1522,7 +1596,7 @@ export default function ContactFormScreen() {
               </RemovableRow>
             ))}
             <AddButton
-              label="Add link"
+              label={t('contacts.form.add_online_service', 'Add online service')}
               onPress={() => updateForm('online', [...form.online, { uri: '', service: '', label: '' }])}
             />
           </Section>
@@ -1530,7 +1604,7 @@ export default function ContactFormScreen() {
           {/* Anniversaries */}
           <Section
             icon={<Cake size={16} color={c.textMuted} />}
-            label="Important dates"
+            label={t('contacts.form.anniversaries', 'Anniversaries')}
             collapsible
             defaultOpen={form.anniversaries.length > 0}
           >
@@ -1546,7 +1620,7 @@ export default function ContactFormScreen() {
                       { flex: 1 },
                       a.date.trim() && !stringToPartialDate(a.date) ? styles.inputInvalid : null,
                     ]}
-                    placeholder="YYYY-MM-DD, YYYY-MM, YYYY or --MM-DD"
+                    placeholder={t('contacts.form.date_placeholder', 'YYYY-MM-DD, YYYY-MM, YYYY or --MM-DD')}
                     placeholderTextColor={c.textMuted}
                     value={a.date}
                     onChangeText={(v) => {
@@ -1559,13 +1633,15 @@ export default function ContactFormScreen() {
                     onPress={() => setDatePickerIndex(i)}
                     style={styles.datePickerBtn}
                     hitSlop={8}
+                    accessibilityRole="button"
+                    accessibilityLabel={t('contacts.form.pick_date', 'Pick a date')}
                   >
                     <Calendar size={18} color={c.primary} />
                   </Pressable>
                 </View>
                 <Pills
                   value={a.kind}
-                  options={ANNIVERSARY_KINDS}
+                  options={opts.anniversaryKinds}
                   onChange={(v) => {
                     const next = [...form.anniversaries];
                     next[i] = { ...a, kind: v };
@@ -1575,7 +1651,7 @@ export default function ContactFormScreen() {
               </RemovableRow>
             ))}
             <AddButton
-              label="Add date"
+              label={t('contacts.form.add_anniversary', 'Add date')}
               onPress={() => updateForm('anniversaries', [...form.anniversaries, { kind: 'birth', date: '' }])}
             />
           </Section>
@@ -1583,7 +1659,7 @@ export default function ContactFormScreen() {
           {/* Personal info */}
           <Section
             icon={<Heart size={16} color={c.textMuted} />}
-            label="Personal info"
+            label={t('contacts.form.personal_info', 'Personal Info')}
             collapsible
             defaultOpen={form.personalInfo.length > 0}
           >
@@ -1594,7 +1670,7 @@ export default function ContactFormScreen() {
               >
                 <TextInput
                   style={styles.input}
-                  placeholder="Hiking, JavaScript, …"
+                  placeholder={t('contacts.form.personal_info_placeholder', 'e.g., Photography')}
                   placeholderTextColor={c.textMuted}
                   value={pi.value}
                   onChangeText={(v) => {
@@ -1605,7 +1681,7 @@ export default function ContactFormScreen() {
                 />
                 <Pills
                   value={pi.kind}
-                  options={PERSONAL_INFO_KINDS}
+                  options={opts.personalInfoKinds}
                   onChange={(v) => {
                     const next = [...form.personalInfo];
                     next[i] = { ...pi, kind: v };
@@ -1614,7 +1690,7 @@ export default function ContactFormScreen() {
                 />
                 <Pills
                   value={pi.level}
-                  options={PERSONAL_INFO_LEVELS}
+                  options={opts.personalInfoLevels}
                   onChange={(v) => {
                     const next = [...form.personalInfo];
                     next[i] = { ...pi, level: v };
@@ -1624,7 +1700,7 @@ export default function ContactFormScreen() {
               </RemovableRow>
             ))}
             <AddButton
-              label="Add"
+              label={t('contacts.form.add_personal_info', 'Add entry')}
               onPress={() => updateForm('personalInfo', [...form.personalInfo, { kind: 'hobby', level: '', value: '' }])}
             />
           </Section>
@@ -1633,28 +1709,28 @@ export default function ContactFormScreen() {
           {!form.isOrg && (
             <Section
               icon={<UserCircle size={16} color={c.textMuted} />}
-              label="Gender"
+              label={t('contacts.form.gender', 'Gender')}
               collapsible
               defaultOpen={!!(form.grammaticalGender || form.pronouns)}
             >
-              <Field label="Grammatical gender">
+              <Field label={t('contacts.form.grammatical_gender', 'Grammatical gender')}>
                 <Pills
                   value={form.grammaticalGender}
                   options={
                     // Values from other clients (RFC 9554 GRAMGENDER: common,
                     // neuter, animate, inanimate) stay selectable so a save
                     // never silently drops them.
-                    form.grammaticalGender && !GENDER_OPTIONS.some((o) => o.value === form.grammaticalGender)
-                      ? [...GENDER_OPTIONS, { value: form.grammaticalGender, label: form.grammaticalGender }]
-                      : GENDER_OPTIONS
+                    form.grammaticalGender && !opts.gender.some((o) => o.value === form.grammaticalGender)
+                      ? [...opts.gender, { value: form.grammaticalGender, label: form.grammaticalGender }]
+                      : opts.gender
                   }
                   onChange={(v) => updateForm('grammaticalGender', v)}
                 />
               </Field>
-              <Field label="Pronouns">
+              <Field label={t('contacts.form.pronouns', 'Pronouns')}>
                 <TextInput
                   style={styles.input}
-                  placeholder="they/them"
+                  placeholder={t('contacts.form.pronouns_placeholder', 'they/them')}
                   placeholderTextColor={c.textMuted}
                   value={form.pronouns}
                   onChangeText={(v) => updateForm('pronouns', v)}
@@ -1666,34 +1742,34 @@ export default function ContactFormScreen() {
           {/* Calendar */}
           <Section
             icon={<Calendar size={16} color={c.textMuted} />}
-            label="Calendar"
+            label={t('contacts.form.calendar', 'Calendar')}
             collapsible
             defaultOpen={!!(form.calendarUri || form.schedulingUri || form.freeBusyUri)}
           >
-            <Field label="Calendar URI">
+            <Field label={t('contacts.form.calendar_uri', 'Calendar URL')}>
               <TextInput
                 style={styles.input}
-                placeholder="https://…"
+                placeholder={t('contacts.form.url_placeholder', 'https://...')}
                 placeholderTextColor={c.textMuted}
                 autoCapitalize="none"
                 value={form.calendarUri}
                 onChangeText={(v) => updateForm('calendarUri', v)}
               />
             </Field>
-            <Field label="Scheduling URI">
+            <Field label={t('contacts.form.scheduling_uri', 'Scheduling URL')}>
               <TextInput
                 style={styles.input}
-                placeholder="https://…"
+                placeholder={t('contacts.form.url_placeholder', 'https://...')}
                 placeholderTextColor={c.textMuted}
                 autoCapitalize="none"
                 value={form.schedulingUri}
                 onChangeText={(v) => updateForm('schedulingUri', v)}
               />
             </Field>
-            <Field label="Free/Busy URI">
+            <Field label={t('contacts.form.freebusy_uri', 'Free/Busy URL')}>
               <TextInput
                 style={styles.input}
-                placeholder="https://…"
+                placeholder={t('contacts.form.url_placeholder', 'https://...')}
                 placeholderTextColor={c.textMuted}
                 autoCapitalize="none"
                 value={form.freeBusyUri}
@@ -1731,7 +1807,7 @@ export default function ContactFormScreen() {
               <View style={styles.pickerSheet}>
                 <View style={styles.pickerHeader}>
                   <Pressable onPress={() => setDatePickerIndex(null)} hitSlop={8}>
-                    <Text style={styles.pickerDone}>Done</Text>
+                    <Text style={styles.pickerDone}>{t('common.done', 'Done')}</Text>
                   </Pressable>
                 </View>
                 <DateTimePicker
diff --git a/src/screens/ContactsScreen.tsx b/src/screens/ContactsScreen.tsx
index a2983067..58467fd3 100644
--- a/src/screens/ContactsScreen.tsx
+++ b/src/screens/ContactsScreen.tsx
@@ -41,6 +41,7 @@ import {
 import Dialog from '../components/Dialog';
 import ContactsSidebarDrawer from '../components/contacts/ContactsSidebarDrawer';
 import { useSettingsStore } from '../stores/settings-store';
+import { useLocaleStore, type TranslateFn } from '../stores/locale-store';
 import { spacing, radius, typography, componentSizes, type ThemePalette } from '../theme/tokens';
 import { useColors } from '../theme/colors';
 
@@ -75,22 +76,28 @@ function groupContacts(sorted: ContactCard[], byLastName: boolean): Section[] {
     .map((title) => ({ title, data: groups[title] }));
 }
 
-function categoryTitle(category: ContactCategory, books: Array<{ id: string; name: string }>, groups: ContactCard[]): string {
+function categoryTitle(
+  category: ContactCategory,
+  books: Array<{ id: string; name: string }>,
+  groups: ContactCard[],
+  t: TranslateFn,
+): string {
   switch (category.type) {
     case 'all':
-      return 'All Contacts';
+      return t('contacts.all_contacts', 'All Contacts');
     case 'addressBook':
-      return books.find((b) => b.id === category.addressBookId)?.name || 'Address Book';
+      return books.find((b) => b.id === category.addressBookId)?.name
+        || t('contacts.address_books.address_book', 'Address Book');
     case 'group': {
       const g = groups.find((c) => c.id === category.groupId);
-      return g ? getContactDisplayName(g) || 'Group' : 'Group';
+      return (g && getContactDisplayName(g)) || t('contacts.group', 'Group');
     }
     case 'keyword':
       return `#${category.keyword}`;
     case 'uncategorized':
-      return 'Uncategorized';
+      return t('contacts.no_category', 'No Category');
     default:
-      return 'Contacts';
+      return t('contacts.title', 'Contacts');
   }
 }
 
@@ -98,6 +105,7 @@ export default function ContactsScreen() {
   const c = useColors();
   const styles = React.useMemo(() => makeStyles(c), [c]);
   const navigation = useNavigation<Nav>();
+  const t = useLocaleStore((s) => s.t);
   const contacts = useContactsStore((s) => s.contacts);
   const addressBooks = useContactsStore((s) => s.addressBooks);
   const loading = useContactsStore((s) => s.loading);
@@ -241,13 +249,13 @@ export default function ContactsScreen() {
         await Sharing.shareAsync(path, {
           mimeType: 'text/vcard',
           UTI: 'public.vcard',
-          dialogTitle: 'Export contacts',
+          dialogTitle: t('contacts.export.title', 'Export Contacts'),
         });
       } else {
         await Share.share({ message: vcf });
       }
     } catch (err) {
-      Alert.alert('Export failed', err instanceof Error ? err.message : 'Unknown error');
+      Alert.alert(t('contacts.export.failed', 'Export failed'), err instanceof Error ? err.message : t('identities.validation_errors.unknown_error', 'Unknown error'));
     }
   };
 
@@ -259,10 +267,16 @@ export default function ContactsScreen() {
   );
 
   const openNewMenu = () => {
-    Alert.alert('Create', undefined, [
-      { text: 'New contact', onPress: () => navigation.navigate('ContactForm', { addressBookId: createBookId }) },
-      { text: 'New group', onPress: () => navigation.navigate('ContactForm', { asGroup: true, addressBookId: createBookId }) },
-      { text: 'Cancel', style: 'cancel' },
+    Alert.alert(t('common.create', 'Create'), undefined, [
+      {
+        text: t('contacts.create_new', 'New Contact'),
+        onPress: () => navigation.navigate('ContactForm', { addressBookId: createBookId }),
+      },
+      {
+        text: t('contacts.groups.create', 'New Group'),
+        onPress: () => navigation.navigate('ContactForm', { asGroup: true, addressBookId: createBookId }),
+      },
+      { text: t('common.cancel', 'Cancel'), style: 'cancel' },
     ]);
   };
 
@@ -280,7 +294,7 @@ export default function ContactsScreen() {
     try {
       await moveContactsToAddressBook(ids, bookId);
     } catch (err) {
-      Alert.alert('Move failed', err instanceof Error ? err.message : 'Unknown error');
+      Alert.alert(t('contacts.address_books.move_failed', 'Failed to move contact'), err instanceof Error ? err.message : t('identities.validation_errors.unknown_error', 'Unknown error'));
     }
   };
 
@@ -291,7 +305,7 @@ export default function ContactsScreen() {
     try {
       await addKeywordToContacts(ids, keyword);
     } catch (err) {
-      Alert.alert('Tagging failed', err instanceof Error ? err.message : 'Unknown error');
+      Alert.alert(t('contacts.bulk.tag_failed', 'Tagging failed'), err instanceof Error ? err.message : t('identities.validation_errors.unknown_error', 'Unknown error'));
     }
   };
 
@@ -305,14 +319,14 @@ export default function ContactsScreen() {
     [addressBooks, importTargetBookId],
   );
 
-  const title = categoryTitle(selectedCategory, addressBooks, groups);
+  const title = categoryTitle(selectedCategory, addressBooks, groups, t);
 
   // Top chip row: All / per-address-book / Groups
   const chips = React.useMemo(() => {
     const items: Array<{ key: string; label: string; category: ContactCategory; active: boolean }> = [
       {
         key: 'all',
-        label: 'All',
+        label: t('contacts.tabs.all', 'All'),
         category: { type: 'all' },
         active: selectedCategory.type === 'all',
       },
@@ -328,21 +342,21 @@ export default function ContactsScreen() {
     if (groups.length > 0) {
       items.push({
         key: 'groups-divider',
-        label: 'Groups',
+        label: t('contacts.tabs.groups', 'Groups'),
         category: { type: 'all' },
         active: false,
       });
       for (const g of groups) {
         items.push({
           key: `group:${g.id}`,
-          label: getContactDisplayName(g) || 'Group',
+          label: getContactDisplayName(g) || t('contacts.group', 'Group'),
           category: { type: 'group', groupId: g.id },
           active: selectedCategory.type === 'group' && selectedCategory.groupId === g.id,
         });
       }
     }
     return items;
-  }, [addressBooks, groups, selectedCategory]);
+  }, [addressBooks, groups, selectedCategory, t]);
 
   return (
     <SafeAreaView style={styles.container} edges={['top']}>
@@ -351,15 +365,25 @@ export default function ContactsScreen() {
       <View style={styles.header}>
         {selectionMode ? (
           <>
-            <Pressable onPress={clearSelection} style={styles.headerIconBtn} hitSlop={8}>
+            <Pressable
+              onPress={clearSelection}
+              style={styles.headerIconBtn}
+              hitSlop={8}
+              accessibilityRole="button"
+              accessibilityLabel={t('contacts.bulk.clear', 'Clear selection')}
+            >
               <X size={22} color={c.text} />
             </Pressable>
-            <Text style={styles.headerTitle}>{selection.size} selected</Text>
+            <Text style={styles.headerTitle}>
+              {t('contacts.bulk.selected', '{count, plural, one {1 selected} other {# selected}}', { count: selection.size })}
+            </Text>
             <View style={styles.headerActions}>
               <Pressable
                 onPress={selectAllVisible}
                 style={styles.headerIconBtn}
                 hitSlop={8}
+                accessibilityRole="button"
+                accessibilityLabel={t('contacts.bulk.select_all', 'Select all')}
               >
                 <CheckSquare size={20} color={c.text} />
               </Pressable>
@@ -367,6 +391,8 @@ export default function ContactsScreen() {
                 onPress={() => { void exportSelected(); }}
                 style={styles.headerIconBtn}
                 hitSlop={8}
+                accessibilityRole="button"
+                accessibilityLabel={t('contacts.bulk.export', 'Export')}
               >
                 <Share2 size={20} color={c.text} />
               </Pressable>
@@ -375,6 +401,8 @@ export default function ContactsScreen() {
                   onPress={() => setMoveSheetOpen(true)}
                   style={styles.headerIconBtn}
                   hitSlop={8}
+                  accessibilityRole="button"
+                  accessibilityLabel={t('contacts.bulk.move_to_address_book', 'Move to address book')}
                 >
                   <FolderInput size={20} color={c.text} />
                 </Pressable>
@@ -383,6 +411,8 @@ export default function ContactsScreen() {
                 onPress={() => setTagSheetOpen(true)}
                 style={styles.headerIconBtn}
                 hitSlop={8}
+                accessibilityRole="button"
+                accessibilityLabel={t('contacts.bulk.add_tag', 'Add tag')}
               >
                 <Tag size={20} color={c.text} />
               </Pressable>
@@ -390,6 +420,8 @@ export default function ContactsScreen() {
                 onPress={() => setConfirmBulkDelete(true)}
                 style={styles.headerIconBtn}
                 hitSlop={8}
+                accessibilityRole="button"
+                accessibilityLabel={t('contacts.bulk.delete', 'Delete')}
               >
                 <Trash2 size={20} color={c.error} />
               </Pressable>
@@ -397,7 +429,13 @@ export default function ContactsScreen() {
           </>
         ) : (
           <>
-            <Pressable onPress={() => setDrawerOpen(true)} style={styles.headerIconBtn} hitSlop={8}>
+            <Pressable
+              onPress={() => setDrawerOpen(true)}
+              style={styles.headerIconBtn}
+              hitSlop={8}
+              accessibilityRole="button"
+              accessibilityLabel={t('contacts.open_categories', 'Open categories')}
+            >
               <Menu size={22} color={c.text} />
             </Pressable>
             <Text style={styles.headerTitle} numberOfLines={1}>{title}</Text>
@@ -407,6 +445,8 @@ export default function ContactsScreen() {
                 onPress={() => setSearchActive((v) => !v)}
                 style={styles.headerIconBtn}
                 hitSlop={8}
+                accessibilityRole="button"
+                accessibilityLabel={t('common.search', 'Search')}
               >
                 <Search size={20} color={c.text} />
               </Pressable>
@@ -414,6 +454,8 @@ export default function ContactsScreen() {
                 onPress={openImport}
                 style={styles.headerIconBtn}
                 hitSlop={8}
+                accessibilityRole="button"
+                accessibilityLabel={t('contacts.import_vcard', 'Import vCard')}
               >
                 <Upload size={20} color={c.text} />
               </Pressable>
@@ -422,6 +464,9 @@ export default function ContactsScreen() {
                 onLongPress={openNewMenu}
                 style={styles.addBtn}
                 hitSlop={8}
+                accessibilityRole="button"
+                accessibilityLabel={t('contacts.create_new', 'New Contact')}
+                accessibilityHint={t('contacts.create_hint_mobile', 'Long-press to create a group instead')}
               >
                 <Plus size={18} color={c.primaryForeground} />
               </Pressable>
@@ -435,14 +480,19 @@ export default function ContactsScreen() {
           <Search size={16} color={c.textMuted} />
           <TextInput
             style={styles.searchInput}
-            placeholder="Search contacts..."
+            placeholder={t('contacts.search_placeholder', 'Search contacts...')}
             placeholderTextColor={c.textMuted}
             value={searchQuery}
             onChangeText={setSearchQuery}
             autoFocus
           />
           {searchQuery.length > 0 && (
-            <Pressable onPress={() => setSearchQuery('')} hitSlop={8}>
+            <Pressable
+              onPress={() => setSearchQuery('')}
+              hitSlop={8}
+              accessibilityRole="button"
+              accessibilityLabel={t('contacts.clear_search', 'Clear search')}
+            >
               <X size={16} color={c.textMuted} />
             </Pressable>
           )}
@@ -464,6 +514,8 @@ export default function ContactsScreen() {
                 key={chip.key}
                 onPress={() => setSelectedCategory(chip.category)}
                 style={[styles.chip, chip.active && styles.chipActive]}
+                accessibilityRole="button"
+                accessibilityState={{ selected: chip.active }}
               >
                 <Text style={[styles.chipText, chip.active && styles.chipTextActive]} numberOfLines={1}>
                   {chip.label}
@@ -521,10 +573,14 @@ export default function ContactsScreen() {
             <View style={styles.emptyState}>
               <UserCircle size={48} color={c.surfaceActive} />
               <Text style={styles.emptyTitle}>
-                {searchQuery ? 'No contacts found' : 'No contacts yet'}
+                {searchQuery
+                  ? t('contacts.empty_search', 'No contacts match your search')
+                  : t('contacts.empty_state_title', 'No contacts yet')}
               </Text>
               <Text style={styles.emptySubtitle}>
-                {searchQuery ? 'Try a different search' : 'Tap + to add one'}
+                {searchQuery
+                  ? t('contacts.empty_search_hint', 'Try a different search term')
+                  : t('contacts.empty_state_hint_mobile', 'Tap + to add one')}
               </Text>
             </View>
           )
@@ -533,10 +589,14 @@ export default function ContactsScreen() {
 
       <Dialog
         visible={confirmBulkDelete}
-        title="Delete contacts"
-        message={`Delete ${selection.size} contact${selection.size === 1 ? '' : 's'}? This cannot be undone.`}
+        title={t('contacts.bulk.delete_confirm_title', 'Delete contacts')}
+        message={t(
+          'contacts.bulk.delete_confirm_mobile',
+          '{count, plural, one {Delete # contact? This cannot be undone.} other {Delete # contacts? This cannot be undone.}}',
+          { count: selection.size },
+        )}
         variant="destructive"
-        confirmText="Delete"
+        confirmText={t('contacts.bulk.delete', 'Delete')}
         onConfirm={doBulkDelete}
         onCancel={() => setConfirmBulkDelete(false)}
       />
@@ -566,7 +626,7 @@ export default function ContactsScreen() {
         visible={importTargetOpen}
         onClose={() => setImportTargetOpen(false)}
         currentBookId={importTargetBookId}
-        title="Import into address book"
+        title={t('contacts.import.into_address_book', 'Import into address book')}
         onPick={(id) => { setImportTargetBookId(id); setImportTargetOpen(false); }}
       />
     </SafeAreaView>
diff --git a/src/screens/GroupDetailScreen.tsx b/src/screens/GroupDetailScreen.tsx
index a5cecbb5..f1f23741 100644
--- a/src/screens/GroupDetailScreen.tsx
+++ b/src/screens/GroupDetailScreen.tsx
@@ -24,6 +24,7 @@ import ContactPickerSheet from '../components/contacts/ContactPickerSheet';
 import Dialog from '../components/Dialog';
 import { spacing, radius, typography, type ThemePalette } from '../theme/tokens';
 import { useColors } from '../theme/colors';
+import { useLocaleStore } from '../stores/locale-store';
 
 type Nav = NativeStackNavigationProp<RootStackParamList, 'GroupDetail'>;
 type Route = RouteProp<RootStackParamList, 'GroupDetail'>;
@@ -33,6 +34,7 @@ export default function GroupDetailScreen() {
   const styles = React.useMemo(() => makeStyles(c), [c]);
   const navigation = useNavigation<Nav>();
   const route = useRoute<Route>();
+  const t = useLocaleStore((s) => s.t);
   const { groupId } = route.params;
 
   const allContacts = useContactsStore((s) => s.contacts);
@@ -57,25 +59,34 @@ export default function GroupDetailScreen() {
     return (
       <SafeAreaView style={styles.container} edges={['top']}>
         <View style={styles.header}>
-          <Pressable onPress={() => navigation.goBack()} style={styles.headerBtn} hitSlop={8}>
+          <Pressable
+            onPress={() => navigation.goBack()}
+            style={styles.headerBtn}
+            hitSlop={8}
+            accessibilityRole="button"
+            accessibilityLabel={t('common.back', 'Back')}
+          >
             <ArrowLeft size={22} color={c.text} />
           </Pressable>
-          <Text style={styles.headerTitle}>Group</Text>
+          <Text style={styles.headerTitle}>{t('contacts.group', 'Group')}</Text>
         </View>
         <View style={styles.missing}>
-          <Text style={styles.missingText}>Group not found</Text>
+          <Text style={styles.missingText}>{t('contacts.groups.not_found', 'Group not found')}</Text>
         </View>
       </SafeAreaView>
     );
   }
 
-  const name = getContactDisplayName(group) || 'Group';
+  const name = getContactDisplayName(group) || t('contacts.group', 'Group');
 
   const emailAll = () => {
     // One recipient per address: two members sharing a mailbox are sent once.
     const recipients: EmailAddress[] = getGroupRecipients(group.id);
     if (recipients.length === 0) {
-      Alert.alert('No emails', 'None of the members have an email address.');
+      Alert.alert(
+        t('contacts.groups.no_emails', 'No emails'),
+        t('contacts.groups.no_member_emails', 'This group has no members with an email address.'),
+      );
       return;
     }
     navigation.navigate('Compose', { prefillTo: recipients });
@@ -85,7 +96,7 @@ export default function GroupDetailScreen() {
     try {
       await addContactsToGroup(group.id, ids);
     } catch (err) {
-      Alert.alert('Failed to add members', err instanceof Error ? err.message : 'Unknown error');
+      Alert.alert(t('contacts.groups.add_members_failed', 'Failed to add members'), err instanceof Error ? err.message : t('identities.validation_errors.unknown_error', 'Unknown error'));
     }
   };
 
@@ -102,7 +113,7 @@ export default function GroupDetailScreen() {
     try {
       await updateContact(group.id, { members: existing });
     } catch (err) {
-      Alert.alert('Failed to remove member', err instanceof Error ? err.message : 'Unknown error');
+      Alert.alert(t('contacts.groups.remove_member_failed', 'Failed to remove member'), err instanceof Error ? err.message : t('identities.validation_errors.unknown_error', 'Unknown error'));
     }
   };
 
@@ -112,7 +123,7 @@ export default function GroupDetailScreen() {
       await deleteContact(group.id);
       navigation.goBack();
     } catch (err) {
-      Alert.alert('Delete failed', err instanceof Error ? err.message : 'Unknown error');
+      Alert.alert(t('contacts.groups.delete_failed', 'Failed to delete group'), err instanceof Error ? err.message : t('identities.validation_errors.unknown_error', 'Unknown error'));
     }
   };
 
@@ -121,7 +132,13 @@ export default function GroupDetailScreen() {
   return (
     <SafeAreaView style={styles.container} edges={['top']}>
       <View style={styles.header}>
-        <Pressable onPress={() => navigation.goBack()} style={styles.headerBtn} hitSlop={8}>
+        <Pressable
+          onPress={() => navigation.goBack()}
+          style={styles.headerBtn}
+          hitSlop={8}
+          accessibilityRole="button"
+          accessibilityLabel={t('common.back', 'Back')}
+        >
           <ArrowLeft size={22} color={c.text} />
         </Pressable>
         <Text style={styles.headerTitle} numberOfLines={1}>{name}</Text>
@@ -130,10 +147,18 @@ export default function GroupDetailScreen() {
             onPress={() => navigation.navigate('ContactForm', { contactId: group.id, asGroup: true })}
             style={styles.headerBtn}
             hitSlop={8}
+            accessibilityRole="button"
+            accessibilityLabel={t('contacts.groups.edit', 'Edit Group')}
           >
             <Edit2 size={18} color={c.text} />
           </Pressable>
-          <Pressable onPress={() => setConfirmDelete(true)} style={styles.headerBtn} hitSlop={8}>
+          <Pressable
+            onPress={() => setConfirmDelete(true)}
+            style={styles.headerBtn}
+            hitSlop={8}
+            accessibilityRole="button"
+            accessibilityLabel={t('contacts.groups.delete_confirm_title', 'Delete group')}
+          >
             <Trash2 size={18} color={c.error} />
           </Pressable>
         </View>
@@ -145,18 +170,22 @@ export default function GroupDetailScreen() {
         </View>
         <Text style={styles.heroName}>{name}</Text>
         <Text style={styles.heroSubtitle}>
-          {members.length} member{members.length === 1 ? '' : 's'}
+          {t('contacts.groups.member_count', '{count, plural, =0 {No members} one {1 member} other {# members}}', { count: members.length })}
         </Text>
       </View>
 
       <View style={styles.actionsRow}>
-        <Pressable onPress={emailAll} style={styles.actionBtn}>
+        <Pressable onPress={emailAll} style={styles.actionBtn} accessibilityRole="button">
           <Mail size={16} color={c.primary} />
-          <Text style={styles.actionLabel}>Email all</Text>
+          <Text style={styles.actionLabel}>{t('contacts.groups.email_all', 'Email all')}</Text>
         </Pressable>
-        <Pressable onPress={() => setPickerOpen(true)} style={[styles.actionBtn, styles.actionBtnPrimary]}>
+        <Pressable
+          onPress={() => setPickerOpen(true)}
+          style={[styles.actionBtn, styles.actionBtnPrimary]}
+          accessibilityRole="button"
+        >
           <Plus size={16} color={c.primaryForeground} />
-          <Text style={[styles.actionLabel, styles.actionLabelPrimary]}>Add member</Text>
+          <Text style={[styles.actionLabel, styles.actionLabelPrimary]}>{t('contacts.groups.add_member', 'Add member')}</Text>
         </Pressable>
       </View>
 
@@ -175,6 +204,8 @@ export default function GroupDetailScreen() {
               onPress={() => setRemovingMember(item)}
               style={styles.removeMemberBtn}
               hitSlop={8}
+              accessibilityRole="button"
+              accessibilityLabel={t('contacts.groups.remove_member', 'Remove member')}
             >
               <UserMinus size={16} color={c.error} />
             </Pressable>
@@ -184,8 +215,8 @@ export default function GroupDetailScreen() {
         ListEmptyComponent={
           <View style={styles.empty}>
             <Users size={40} color={c.surfaceActive} />
-            <Text style={styles.emptyTitle}>No members yet</Text>
-            <Text style={styles.emptySubtitle}>Tap "Add member" to get started</Text>
+            <Text style={styles.emptyTitle}>{t('contacts.groups.no_members', 'No members in this group')}</Text>
+            <Text style={styles.emptySubtitle}>{t('contacts.groups.no_members_hint', 'Tap "Add member" to get started')}</Text>
           </View>
         }
         contentContainerStyle={{ paddingBottom: spacing.xxxl }}
@@ -195,27 +226,29 @@ export default function GroupDetailScreen() {
         visible={pickerOpen}
         onClose={() => setPickerOpen(false)}
         onSelect={(ids) => { void addMembers(ids); }}
-        title="Add members"
+        title={t('contacts.groups.add_members', 'Add members')}
         excludedIds={excludedIds}
         multi
       />
 
       <Dialog
         visible={confirmDelete}
-        title="Delete group"
-        message={`Delete "${name}"? Members will not be deleted.`}
+        title={t('contacts.groups.delete_confirm_title', 'Delete group')}
+        message={t('contacts.groups.delete_confirm_named', 'Delete "{name}"? Members will not be deleted.', { name })}
         variant="destructive"
-        confirmText="Delete"
+        confirmText={t('contacts.context_menu.delete', 'Delete')}
         onConfirm={doDelete}
         onCancel={() => setConfirmDelete(false)}
       />
 
       <Dialog
         visible={!!removingMember}
-        title="Remove member"
-        message={`Remove "${removingMember ? getContactDisplayName(removingMember) : ''}" from this group?`}
+        title={t('contacts.groups.remove_member', 'Remove member')}
+        message={t('contacts.groups.remove_member_confirm', 'Remove "{name}" from this group?', {
+          name: removingMember ? getContactDisplayName(removingMember) : '',
+        })}
         variant="destructive"
-        confirmText="Remove"
+        confirmText={t('common.remove', 'Remove')}
         onConfirm={() => {
           if (removingMember) void removeMember(removingMember);
           setRemovingMember(null);