diff --git a/components/settings/__tests__/calendar-management-settings.test.tsx b/components/settings/__tests__/calendar-management-settings.test.tsx
index 4f2b4bdce..614e64976 100644
--- a/components/settings/__tests__/calendar-management-settings.test.tsx
+++ b/components/settings/__tests__/calendar-management-settings.test.tsx
@@ -68,6 +68,8 @@ describe('CalendarManagementSettings CalDAV fallback address', () => {
 
     render(<CalendarManagementSettings />);
 
+    // The address waits behind "Use in other apps" (usability pass 2026-11-04).
+    fireEvent.click(await screen.findByTestId('calendar-use-in-other-apps'));
     const url = await screen.findByText('https://host.example/stalwart/.well-known/caldav');
     // Left to right in Arabic too: the start of the address stays in view.
     expect(url).toHaveAttribute('dir', 'ltr');
diff --git a/components/settings/__tests__/settings-page-wording.test.tsx b/components/settings/__tests__/settings-page-wording.test.tsx
new file mode 100644
index 000000000..069be3b8d
--- /dev/null
+++ b/components/settings/__tests__/settings-page-wording.test.tsx
@@ -0,0 +1,133 @@
+import { act, fireEvent, render, screen, within } from '@testing-library/react';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import type { AddressBook, Calendar } from '@/lib/jmap/types';
+import { useAuthStore } from '@/stores/auth-store';
+import { useCalendarStore } from '@/stores/calendar-store';
+import { useContactStore } from '@/stores/contact-store';
+import { useThemeStore } from '@/stores/theme-store';
+import { ThemesSettings } from '../themes-settings';
+import { AddressBookManagementSettings } from '../address-book-management-settings';
+import { CalendarManagementSettings } from '../calendar-management-settings';
+import { FilesSettingsComponent } from '../files-settings';
+import { DownloadsSettings } from '../downloads-settings';
+
+// Usability pass 2026-11-04, settings-11, -33 and -36: settings pages showed
+// the server's names ("Stalwart Calendar (me@example.org)"), a raw CalDAV
+// address on every calendar, English sample text in every language and a
+// "Default" badge on the theme called Default. vitest.setup.ts renders
+// strings as their raw keys.
+
+vi.mock('../settings-section', async (importOriginal) => ({
+  ...(await importOriginal<typeof import('../settings-section')>()),
+  SettingsSection: ({ children }: { children: React.ReactNode }) => <div>{children}</div>,
+}));
+
+const initial = {
+  auth: useAuthStore.getState(),
+  contacts: useContactStore.getState(),
+  calendars: useCalendarStore.getState(),
+};
+afterEach(() => {
+  useAuthStore.setState(initial.auth, true);
+  useContactStore.setState(initial.contacts, true);
+  useCalendarStore.setState(initial.calendars, true);
+  vi.restoreAllMocks();
+});
+
+describe('theme gallery', () => {
+  beforeEach(() => {
+    act(() => {
+      useThemeStore.setState({ activeThemeId: null, syncServerThemes: vi.fn().mockResolvedValue(undefined) });
+    });
+  });
+
+  it('puts no "Default" badge on the theme that is called Default', () => {
+    render(<ThemesSettings embedded />);
+    const card = document.querySelector('[data-search-label="default_name"]') as HTMLElement;
+    expect(card).toBeTruthy();
+    expect(within(card).queryByText('default_badge')).toBeNull();
+  });
+});
+
+describe('server default names', () => {
+  const rights = { mayRead: true, mayWrite: true, mayShare: true, mayDelete: true };
+
+  it('shows the address book Stalwart made as "Contacts", and a chosen name as it is', () => {
+    useAuthStore.setState({ client: { getAccountId: () => 'acc' } } as never);
+    useContactStore.setState({
+      addressBooks: [
+        { id: 'd', name: 'Stalwart Address Book (me@example.org)', isDefault: true, isShared: false, myRights: rights, shareWith: null },
+        { id: 'c', name: 'Club', isDefault: false, isShared: false, myRights: rights, shareWith: null },
+      ] as unknown as AddressBook[],
+      contacts: [],
+      supportsSync: true,
+      fetchAddressBooks: vi.fn(async () => {}),
+    } as never);
+    render(<AddressBookManagementSettings />);
+    expect(screen.getByText('default_address_book')).toBeInTheDocument();
+    expect(screen.getByText('Club')).toBeInTheDocument();
+    expect(screen.queryByText(/Stalwart Address Book/)).toBeNull();
+  });
+
+  it('shows the calendar Stalwart made as "Calendar" and keeps its name when saved unchanged', async () => {
+    const updateCalendar = vi.fn().mockResolvedValue(undefined);
+    useAuthStore.setState({ client: { getAccountId: () => 'acct-1' }, serverUrl: null, username: null } as never);
+    useCalendarStore.setState({
+      calendars: [{
+        id: 'cal', name: 'Stalwart Calendar (me@example.org)', color: '#3b82f6', isDefault: true, isShared: false, shareWith: null,
+        myRights: { mayShare: true, mayDelete: true, mayWriteAll: true },
+      } as unknown as Calendar],
+      icalSubscriptions: [],
+      updateCalendar,
+    } as never);
+    render(<CalendarManagementSettings />);
+    expect(screen.getByText('default_calendar')).toBeInTheDocument();
+    expect(screen.queryByText(/Stalwart Calendar/)).toBeNull();
+
+    fireEvent.click(screen.getByTitle('edit'));
+    fireEvent.click(screen.getByText('save'));
+    await vi.waitFor(() => expect(updateCalendar).toHaveBeenCalledTimes(1));
+    expect(updateCalendar.mock.calls[0][2]).toEqual({ name: 'Stalwart Calendar (me@example.org)' });
+  });
+});
+
+describe('calendar address for other apps', () => {
+  it('keeps the CalDAV address behind "Use in other apps"', async () => {
+    vi.spyOn(globalThis, 'fetch').mockResolvedValue(new Response('{}', { status: 502 }));
+    useAuthStore.setState({
+      client: { getAccountId: () => 'acct-1' }, serverUrl: 'https://host.example/', username: 'alice@example.com',
+    } as never);
+    useCalendarStore.setState({
+      calendars: [{
+        id: 'cal', name: 'Home', color: '#3b82f6', isDefault: true, isShared: false, shareWith: null,
+        myRights: { mayShare: true, mayDelete: true, mayWriteAll: true },
+      } as unknown as Calendar],
+      icalSubscriptions: [],
+      updateCalendar: vi.fn(),
+    } as never);
+    render(<CalendarManagementSettings />);
+
+    const button = await screen.findByTestId('calendar-use-in-other-apps');
+    expect(button).toHaveTextContent('use_in_other_apps');
+    expect(screen.queryByText('https://host.example/.well-known/caldav')).toBeNull();
+    fireEvent.click(button);
+    expect(screen.getByText('https://host.example/.well-known/caldav')).toBeInTheDocument();
+  });
+});
+
+describe('previews in the user language', () => {
+  it('labels the Files preview through the translations', () => {
+    render(<FilesSettingsComponent />);
+    for (const key of ['name', 'size', 'modified', 'preview_documents', 'preview_photos']) {
+      expect(screen.getAllByText(key).length).toBeGreaterThan(0);
+    }
+    expect(screen.queryByText('Documents')).toBeNull();
+    expect(screen.queryByText('Modified')).toBeNull();
+  });
+
+  it('builds the file name preview from a translated sample subject', () => {
+    render(<DownloadsSettings />);
+    expect(document.body.textContent).toContain('sample_subject');
+    expect(document.body.textContent).not.toContain('Benachrichtigung');
+  });
+});
diff --git a/components/settings/address-book-management-settings.tsx b/components/settings/address-book-management-settings.tsx
index b97f5cb91..ed9a1fc61 100644
--- a/components/settings/address-book-management-settings.tsx
+++ b/components/settings/address-book-management-settings.tsx
@@ -9,6 +9,7 @@ import { useManagedAccountStore } from "@/stores/managed-account-store";
 import { toast } from "@/stores/toast-store";
 import { SettingsSection } from "./settings-section";
 import { cn } from "@/lib/utils";
+import { collectionDisplayName } from "@/lib/default-collection-name";
 import { IconButton } from "@/components/ui/icon-button";
 import type { AddressBook, AddressBookRights } from "@/lib/jmap/types";
 import { ShareCollectionDialog } from "./share-collection-dialog";
@@ -79,6 +80,8 @@ export function AddressBookManagementSettings() {
   const t = useTranslations("contacts.address_books");
   const tContacts = useTranslations("contacts");
   const tSettings = useTranslations("settings.contacts");
+  const tWording = useTranslations("uxs_wording");
+  const bookName = (book: AddressBook) => collectionDisplayName(book.name, "addressBook", tWording("default_address_book"));
   const { client } = useAuthStore();
   const managedAccountId = useManagedAccountStore((s) => s.managedAccountId);
   const { addressBooks, contacts, supportsSync, fetchAddressBooks, createAddressBook, renameAddressBook, shareAddressBook, setDefaultAddressBook, removeAddressBook, renameKeyword } = useContactStore();
@@ -144,7 +147,7 @@ export function AddressBookManagementSettings() {
     if (!client) return;
     const ok = await confirm({
       title: t("delete_title"),
-      message: t("confirm_delete", { name: book.name }),
+      message: t("confirm_delete", { name: bookName(book) }),
       confirmText: t("delete"),
       variant: "destructive",
     });
@@ -225,8 +228,9 @@ export function AddressBookManagementSettings() {
       return (
         <AddressBookEditRow
           key={book.id}
-          initial={book.name}
-          onSave={(name) => handleUpdate(book, name)}
+          initial={bookName(book)}
+          // Saved unchanged, the shown name keeps the server's own.
+          onSave={(name) => handleUpdate(book, name === bookName(book) ? book.name : name)}
           onCancel={() => setEditingId(null)}
           isLoading={isLoading}
         />
@@ -245,7 +249,7 @@ export function AddressBookManagementSettings() {
       >
         <Book className="w-4 h-4 text-muted-foreground flex-shrink-0" />
         <div className="flex-1 min-w-0">
-          <span className="text-sm font-medium truncate block" title={book.name} dir="auto">{book.name}</span>
+          <span className="text-sm font-medium truncate block" title={bookName(book)} dir="auto">{bookName(book)}</span>
         </div>
         {book.isDefault && (
           <span className="flex-shrink-0 text-xs text-muted-foreground bg-muted px-2 py-0.5 rounded-full">
@@ -269,7 +273,7 @@ export function AddressBookManagementSettings() {
             actions sit behind a ⋮ there, as for calendars. */}
         {actions.length > 0 && (
           <IconButton
-            label={tContacts("row_actions", { name: book.name })}
+            label={tContacts("row_actions", { name: bookName(book) })}
             className="sm:hidden flex-shrink-0 text-muted-foreground"
             onClick={(e) => openContextMenuFrom(e.currentTarget, book, "end")}
           >
@@ -436,7 +440,7 @@ export function AddressBookManagementSettings() {
         <ShareCollectionDialog
           client={client}
           kind="addressBook"
-          collectionName={book.name}
+          collectionName={bookName(book)}
           shareWith={book.shareWith}
           ownAccountId={client.getAccountId()}
           onShare={async (principalId, rights) => {
diff --git a/components/settings/calendar-management-settings.tsx b/components/settings/calendar-management-settings.tsx
index 5713ff424..472b72417 100644
--- a/components/settings/calendar-management-settings.tsx
+++ b/components/settings/calendar-management-settings.tsx
@@ -18,6 +18,7 @@ import { alertsToRows, rowsToAlerts, type AlertRow } from '@/lib/calendar-alerts
 import { ShareCollectionDialog } from './share-collection-dialog';
 import type { CalendarRights } from '@/lib/jmap/types';
 import { cn, formatDateTime, redactUrlCredentials } from '@/lib/utils';
+import { collectionDisplayName } from '@/lib/default-collection-name';
 import { ICalImportModal } from '@/components/calendar/ical-import-modal';
 import { ICalSubscriptionModal } from '@/components/calendar/ical-subscription-modal';
 import { useSettingsStore } from '@/stores/settings-store';
@@ -198,6 +199,7 @@ export function CalendarDefaultAlertsForm({
   isLoading: boolean;
 }) {
   const t = useTranslations('calendar.management');
+  const tWording = useTranslations('uxs_wording');
   // Alerts the rows can't show are written back unchanged.
   const [timed] = useState(() => alertsToRows(calendar.defaultAlertsWithTime));
   const [allDay] = useState(() => alertsToRows(calendar.defaultAlertsWithoutTime));
@@ -219,7 +221,7 @@ export function CalendarDefaultAlertsForm({
   return (
     <div className="space-y-3 p-3 rounded-md border border-primary/30 bg-accent/30">
       <div>
-        <h4 className="text-sm font-medium">{t('default_alerts_title', { name: calendar.name })}</h4>
+        <h4 className="text-sm font-medium">{t('default_alerts_title', { name: collectionDisplayName(calendar.name, 'calendar', tWording('default_calendar')) })}</h4>
         <p className="text-xs text-muted-foreground mt-0.5">{t('default_alerts_hint')}</p>
       </div>
 
@@ -269,6 +271,8 @@ export function CalendarDefaultAlertsForm({
 
 export function CalendarManagementSettings() {
   const t = useTranslations('calendar.management');
+  const tWording = useTranslations('uxs_wording');
+  const calName = (cal: { name: string }) => collectionDisplayName(cal.name, 'calendar', tWording('default_calendar'));
   const { client, serverUrl, username } = useAuthStore();
   const managedAccountId = useManagedAccountStore((s) => s.managedAccountId);
   const { calendars, updateCalendar, reorderCalendars, shareCalendar, createCalendar, removeCalendar, clearCalendarEvents, fetchCalendars, icalSubscriptions: allSubs, removeICalSubscription, refreshICalSubscription, isSubscriptionCalendar } = useCalendarStore();
@@ -290,6 +294,8 @@ export function CalendarManagementSettings() {
   const [clearingId, setClearingId] = useState<string | null>(null);
   const [isLoading, setIsLoading] = useState(false);
   const [colorPickerId, setColorPickerId] = useState<string | null>(null);
+  // The calendar whose CalDAV address is open under "Use in other apps".
+  const [shownUrlId, setShownUrlId] = useState<string | null>(null);
   const [sharingId, setSharingId] = useState<string | null>(null);
   const [showImportModal, setShowImportModal] = useState(false);
   const [showSubscriptionModal, setShowSubscriptionModal] = useState(false);
@@ -654,8 +660,9 @@ export function CalendarManagementSettings() {
             return (
               <CalendarEditForm
                 key={cal.id}
-                initial={{ name: cal.name, color }}
-                onSave={(data) => handleUpdate(cal.id, data, color)}
+                initial={{ name: calName(cal), color }}
+                // Saved unchanged, the shown name keeps the server's own.
+                onSave={(data) => handleUpdate(cal.id, { ...data, name: data.name === calName(cal) ? cal.name : data.name }, color)}
                 onCancel={() => setEditingId(null)}
                 isLoading={isLoading}
               />
@@ -735,10 +742,24 @@ export function CalendarManagementSettings() {
               <CalendarIcon className="w-4 h-4 text-muted-foreground flex-shrink-0" />
 
               <div className="flex-1 min-w-0">
-                <span className="text-sm font-medium truncate block" title={cal.name} dir="auto">{cal.name}</span>
+                <span className="text-sm font-medium truncate block" title={calName(cal)} dir="auto">{calName(cal)}</span>
                 {(() => {
                   const caldavUrl = buildCalDavUrl(cal.id);
                   if (!caldavUrl) return null;
+                  if (shownUrlId !== cal.id) {
+                    return (
+                      <button
+                        type="button"
+                        aria-expanded={false}
+                        data-testid="calendar-use-in-other-apps"
+                        onClick={(e) => { e.stopPropagation(); setShownUrlId(cal.id); }}
+                        className="mt-0.5 inline-flex items-center gap-1 text-xs text-muted-foreground hover:text-foreground"
+                      >
+                        <Link className="w-3 h-3 flex-shrink-0" aria-hidden="true" />
+                        {tWording('use_in_other_apps')}
+                      </button>
+                    );
+                  }
                   return (
                     <div className="flex items-center gap-1 mt-0.5">
                       <Link className="w-3 h-3 text-muted-foreground flex-shrink-0" />
@@ -791,7 +812,7 @@ export function CalendarManagementSettings() {
                   and pushed the Default badge over the copy button, so the
                   row actions sit behind a ⋮ there, as for folders. */}
               <IconButton
-                label={t('row_actions', { name: cal.name })}
+                label={t('row_actions', { name: calName(cal) })}
                 className="sm:hidden flex-shrink-0 text-muted-foreground"
                 onClick={(e) => openContextMenuFrom(e.currentTarget, cal, 'end')}
               >
@@ -943,7 +964,7 @@ export function CalendarManagementSettings() {
         onClose={() => setDeletingId(null)}
         onConfirm={() => { if (deletingId) void handleDelete(deletingId); }}
         title={tConfirm('delete_title')}
-        message={t('confirm_delete', { name: calendars.find((cal) => cal.id === deletingId)?.name ?? '' })}
+        message={t('confirm_delete', { name: calName(calendars.find((cal) => cal.id === deletingId) ?? { name: '' }) })}
         confirmText={t('delete')}
         variant="destructive"
       />
@@ -952,7 +973,7 @@ export function CalendarManagementSettings() {
         onClose={() => setClearingId(null)}
         onConfirm={() => { if (clearingId) void handleClear(clearingId); }}
         title={tConfirm('clear_title')}
-        message={t('confirm_clear', { name: calendars.find((cal) => cal.id === clearingId)?.name ?? '' })}
+        message={t('confirm_clear', { name: calName(calendars.find((cal) => cal.id === clearingId) ?? { name: '' }) })}
         confirmText={t('clear_events')}
         variant="destructive"
       />
@@ -996,7 +1017,7 @@ export function CalendarManagementSettings() {
           <ShareCollectionDialog
             client={client}
             kind="calendar"
-            collectionName={cal.name}
+            collectionName={calName(cal)}
             shareWith={cal.shareWith}
             ownAccountId={client.getAccountId()}
             onShare={async (principalId, rights) => {
diff --git a/components/settings/downloads-settings.tsx b/components/settings/downloads-settings.tsx
index b134869ad..9c334a905 100644
--- a/components/settings/downloads-settings.tsx
+++ b/components/settings/downloads-settings.tsx
@@ -147,7 +147,10 @@ export function DownloadsSettings() {
   // With the Archive action off a stored "archive" keeps the message, so it shows as "keep".
   const postExportShown = archiveActionEnabled || postExportAction !== "archive" ? postExportAction : "keep";
 
-  const sampleEmail = useMemo(() => buildSampleEmail(), []);
+  const tWording = useTranslations("uxs_wording");
+  // A subject in the user's language, with a letter or two the "plain letters" option changes.
+  const sampleSubject = tWording("sample_subject");
+  const sampleEmail = useMemo(() => buildSampleEmail(sampleSubject), [sampleSubject]);
   const sampleAttachment = useMemo(() => ({ name: "Invoice-2026-05.pdf", type: "application/pdf" }), []);
 
   const transform = useMemo(
diff --git a/components/settings/files-settings.tsx b/components/settings/files-settings.tsx
index 15677473f..db7644a03 100644
--- a/components/settings/files-settings.tsx
+++ b/components/settings/files-settings.tsx
@@ -11,6 +11,8 @@ import { useConfig } from "@/hooks/use-config";
 
 interface SampleFile {
   name: string;
+  /** Folder names are translated; file names stay as they are. */
+  labelKey?: "preview_documents" | "preview_photos";
   isFolder: boolean;
   size: number;
   modified: string;
@@ -19,11 +21,11 @@ interface SampleFile {
 }
 
 const SAMPLE_FILES: SampleFile[] = [
-  { name: "Documents", isFolder: true, size: 0, modified: "2026-03-10" },
-  { name: "Photos", isFolder: true, size: 0, modified: "2026-03-14" },
+  { name: "Documents", labelKey: "preview_documents", isFolder: true, size: 0, modified: "2026-03-10" },
+  { name: "Photos", labelKey: "preview_photos", isFolder: true, size: 0, modified: "2026-03-14" },
   { name: "report.pdf", isFolder: false, size: 245000, modified: "2026-03-15" },
   { name: "notes.md", isFolder: false, size: 1200, modified: "2026-03-12" },
-  { name: "vacation.jpg", isFolder: false, size: 3400000, modified: "2026-03-08", thumbnailUrl: "/branding/Bulwark_Logo_Color.png" },
+  { name: "logo.png", isFolder: false, size: 34000, modified: "2026-03-08", thumbnailUrl: "/branding/Bulwark_Logo_Color.png" },
   { name: "song.mp3", isFolder: false, size: 5200000, modified: "2026-03-01" },
   { name: ".config", isFolder: false, size: 340, modified: "2026-02-20", hidden: true },
 ];
@@ -58,12 +60,16 @@ function formatSize(bytes: number): string {
 }
 
 function FilesSettingsPreview({ settings }: { settings: FilesSettings }) {
+  const tFiles = useTranslations("files");
+  const tWording = useTranslations("uxs_wording");
   // The sample thumbnail shows the configured logo on a branded deployment,
   // the bundled one otherwise. (#1160)
   const { appLogoLightUrl, appLogoDarkUrl } = useConfig();
   const thumbnailUrl = appLogoLightUrl || appLogoDarkUrl || "/branding/Bulwark_Logo_Color.png";
   const sortedFiles = useMemo(() => {
-    let files = SAMPLE_FILES.map((f) => (f.thumbnailUrl ? { ...f, thumbnailUrl } : f)).filter((f) => {
+    let files = SAMPLE_FILES
+      .map((f) => (f.labelKey ? { ...f, name: tWording(f.labelKey) } : f))
+      .map((f) => (f.thumbnailUrl ? { ...f, thumbnailUrl } : f)).filter((f) => {
       if (!settings.showHiddenFiles && f.hidden) return false;
       return true;
     });
@@ -82,14 +88,14 @@ function FilesSettingsPreview({ settings }: { settings: FilesSettings }) {
     });
 
     return files;
-  }, [settings.showHiddenFiles, settings.defaultSortKey, settings.defaultSortDir, thumbnailUrl]);
+  }, [settings.showHiddenFiles, settings.defaultSortKey, settings.defaultSortDir, thumbnailUrl, tWording]);
 
   const listView = (
     <div className="flex-1 min-w-0 overflow-hidden">
       <div className="flex items-center gap-3 px-2 py-1 text-[0.625rem] font-medium text-muted-foreground border-b border-border bg-muted/50">
-        <span className="flex-1 min-w-0">Name</span>
-        <span className="w-14 text-end">Size</span>
-        <span className="w-16 text-end">Modified</span>
+        <span className="flex-1 min-w-0">{tFiles("name")}</span>
+        <span className="w-14 text-end">{tFiles("size")}</span>
+        <span className="w-16 text-end">{tFiles("modified")}</span>
       </div>
       {sortedFiles.map((file) => (
         <div
diff --git a/components/settings/themes-settings.tsx b/components/settings/themes-settings.tsx
index a436f677e..5c93d38b7 100644
--- a/components/settings/themes-settings.tsx
+++ b/components/settings/themes-settings.tsx
@@ -237,7 +237,8 @@ function ThemeCard({ name, author, preview, css, isDark, isDefaultTheme, isActiv
                   <Lock className="w-2.5 h-2.5" />
                 </span>
               )}
-              {isDefault && (
+              {/* The built-in theme is called Default already: a badge saying so again is noise. */}
+              {isDefault && !isDefaultTheme && (
                 <span className="text-[0.625rem] px-1.5 py-0.5 rounded bg-primary/10 text-primary font-medium">{t('default_badge')}</span>
               )}
               {isActive && <Check className="w-4 h-4 text-primary" />}
diff --git a/lib/default-collection-name.ts b/lib/default-collection-name.ts
new file mode 100644
index 000000000..dd2eff62a
--- /dev/null
+++ b/lib/default-collection-name.ts
@@ -0,0 +1,23 @@
+/**
+ * Stalwart names the calendar and address book it creates for a new account
+ * "Stalwart Calendar (<address>)" and "Stalwart Address Book (<address>)"
+ * (registry defaults, 0.16 and 1.0). Settings show those as plain "Calendar"
+ * and "Contacts" in the user's language, the way the sidebar shows "Sent"
+ * instead of the server's folder name. A name the user chose stays as it is.
+ */
+
+const SERVER_DEFAULT_NAMES = {
+  calendar: /^Stalwart Calendar(?: \([^()]*\))?$/,
+  addressBook: /^Stalwart Address Book(?: \([^()]*\))?$/,
+} as const;
+
+export type DefaultCollectionKind = keyof typeof SERVER_DEFAULT_NAMES;
+
+export function isServerDefaultCollectionName(name: string | undefined, kind: DefaultCollectionKind): boolean {
+  return !!name && SERVER_DEFAULT_NAMES[kind].test(name.trim());
+}
+
+/** The name to show: `plainName` for the server's own default name, else the collection's name. */
+export function collectionDisplayName(name: string, kind: DefaultCollectionKind, plainName: string): string {
+  return isServerDefaultCollectionName(name, kind) ? plainName : name;
+}
diff --git a/lib/download-filename.ts b/lib/download-filename.ts
index 9b60f0888..ea26665b1 100644
--- a/lib/download-filename.ts
+++ b/lib/download-filename.ts
@@ -269,7 +269,7 @@ export function bundleExportFilename(
 }
 
 // Build a synthetic email for previewing templates in the settings UI.
-export function buildSampleEmail(): Email {
+export function buildSampleEmail(subject = "Benachrichtigung von Ihrem Gerät"): Email {
   // Use a fixed date so the preview doesn't churn as the user types.
   const iso = "2026-05-22T14:05:33Z";
   return {
@@ -283,7 +283,7 @@ export function buildSampleEmail(): Email {
     from: [{ name: "Alice Sender", email: "alice@example.com" }],
     to: [{ name: "Bob Recipient", email: "bob@example.com" }],
     cc: [],
-    subject: "Benachrichtigung von Ihrem Gerät",
+    subject,
     preview: "",
     hasAttachment: true,
     blobId: "sample-blob",