diff --git a/components/calendar/calendar-app.tsx b/components/calendar/calendar-app.tsx
index 1263433fb..11a50836e 100644
--- a/components/calendar/calendar-app.tsx
+++ b/components/calendar/calendar-app.tsx
@@ -115,6 +115,7 @@ import { useLiteLinkSegments } from "@/hooks/use-lite-link-segments";
 import { IS_LITE } from "@/lib/lite";
 import { findMeetingLink } from "@/lib/event-links";
 import { useDocumentTitle } from "@/hooks/use-document-title";
+import { useDesktopWindowName } from "@/lib/desktop/window-name";
 import { useFocusTrap } from "@/hooks/use-focus-trap";
 import { MvTopBar } from "@/components/layout/mv-top-bar";
 import { useMountainViewShell } from "@/hooks/use-mountain-view-shell";
@@ -161,6 +162,7 @@ export function CalendarApp({ linkSegments: routeSegments }: CalendarAppProps =
   const tSidebar = useTranslations("sidebar");
   const tOffline = useTranslations("calendar_offline");
   useDocumentTitle(tSidebar("calendar"));
+  useDesktopWindowName(tSidebar("calendar"), { withAccount: true });
   const skeletonLabels = useSkeletonLabels();
   const tWebcalAction = useTranslations("calendar.webcal_action");
   const { demoMode } = useConfig();
diff --git a/components/contacts/contacts-app.tsx b/components/contacts/contacts-app.tsx
index 00e76d684..f59092a32 100644
--- a/components/contacts/contacts-app.tsx
+++ b/components/contacts/contacts-app.tsx
@@ -60,6 +60,7 @@ import { useDeepLinkUrl } from "@/hooks/use-deep-link-url";
 import { useProInterfaceActive } from "@/components/pro/pro-interface-redirect";
 import { useLiteLinkSegments } from "@/hooks/use-lite-link-segments";
 import { useDocumentTitle } from "@/hooks/use-document-title";
+import { useDesktopWindowName } from "@/lib/desktop/window-name";
 import { ContactsSkeleton, ContactsSkeletonBody } from "@/components/boot-skeleton/contacts-skeleton";
 import { useSkeletonLabels } from "@/components/boot-skeleton/use-skeleton-labels";
 import { useRegisterCommands } from "@/lib/command-registry";
@@ -110,6 +111,7 @@ function ContactsAppContent({ linkSegments: routeSegments }: ContactsAppProps =
   const tShell = useTranslations("shell");
   const tMerge = useTranslations("ux_pim_cimport");
   useDocumentTitle(tSidebar("contacts"));
+  useDesktopWindowName(tSidebar("contacts"), { withAccount: true });
   const contactsEnabled = usePolicyStore((s) => s.isFeatureEnabled('contactsEnabled'));
   const { client, isAuthenticated, logout, checkAuth, isLoading: authLoading } = useAuthStore();
   const { showAppsModal, inlineApp, loadedApps, handleManageApps, handleInlineApp, closeInlineApp, closeAppsModal } = useSidebarApps();
diff --git a/components/email/__tests__/composer-own-window.test.tsx b/components/email/__tests__/composer-own-window.test.tsx
index 2731b6a23..d6d312db5 100644
--- a/components/email/__tests__/composer-own-window.test.tsx
+++ b/components/email/__tests__/composer-own-window.test.tsx
@@ -112,6 +112,15 @@ function target(shown = true): ComposerPopOut & { handed: ComposerDraftData[]; c
 
 const DRAFT: ComposerDraftData = { to: '', cc: '', bcc: '', subject: 'Old', body: '', showCc: false, showBcc: false, selectedIdentityId: null, subAddressTag: '', mode: 'compose', draftId: null };
 
+describe('"Move to the main window" in quick compose', () => {
+  it('shows an arrow going in, not the arrows of leaving full screen', () => {
+    mount({ popOut: vi.fn(() => target()), popOutToMainLabel: 'Move to the main window' });
+    const svg = screen.getByTestId('composer-back-to-main').querySelector('svg');
+    expect(svg?.getAttribute('class')).toContain('tabler-icon-login');
+    expect(svg?.getAttribute('class')).not.toContain('minimize');
+  });
+});
+
 describe('"Open in new window" on a composer', () => {
   it('is not there without the host offering it: browsers stay as they are', () => {
     mount({});
diff --git a/components/email/email-composer.tsx b/components/email/email-composer.tsx
index fc292094a..bbcff311d 100644
--- a/components/email/email-composer.tsx
+++ b/components/email/email-composer.tsx
@@ -38,6 +38,7 @@ import {
   Minimize2,
   Trash2,
   ExternalLink,
+  LogIn,
   ReplyAll,
   Reply,
   Forward,
@@ -4682,7 +4683,8 @@ export function EmailComposer({
       title={popOutToMainLabel ?? tWindows('open_in_window')}
       data-testid={popOutToMainLabel ? "composer-back-to-main" : "composer-open-in-window"}
     >
-      {popOutToMainLabel ? <Minimize2 className={iconClassName} /> : <ExternalLink className={iconClassName} />}
+      {/* Into the main window: an arrow going in, not the inward arrows of leaving full screen. */}
+      {popOutToMainLabel ? <LogIn className={iconClassName} /> : <ExternalLink className={iconClassName} />}
     </button>
   );
 
diff --git a/components/files/files-app.tsx b/components/files/files-app.tsx
index 8b8786e1a..344d33605 100644
--- a/components/files/files-app.tsx
+++ b/components/files/files-app.tsx
@@ -51,6 +51,7 @@ import { useDeepLinkUrl } from "@/hooks/use-deep-link-url";
 import { useProInterfaceActive } from "@/components/pro/pro-interface-redirect";
 import { useLiteLinkSegments } from "@/hooks/use-lite-link-segments";
 import { useDocumentTitle } from "@/hooks/use-document-title";
+import { useDesktopWindowName } from "@/lib/desktop/window-name";
 import { MvTopBar } from "@/components/layout/mv-top-bar";
 import { useMountainViewShell } from "@/hooks/use-mountain-view-shell";
 import { FilesSkeleton, FilesSkeletonBody } from "@/components/boot-skeleton/files-skeleton";
@@ -69,6 +70,7 @@ export function FilesApp({ linkSegments: routeSegments }: FilesAppProps = {}) {
   const tSidebar = useTranslations("sidebar");
   const tShell = useTranslations("shell");
   useDocumentTitle(tSidebar("files"));
+  useDesktopWindowName(tSidebar("files"), { withAccount: true });
   const tDeepLink = useTranslations("deep_link");
   const filesEnabled = usePolicyStore((s) => s.isFeatureEnabled('filesEnabled'));
   const { isAuthenticated, logout, checkAuth, isLoading: authLoading, client } = useAuthStore();
diff --git a/components/layout/window-menu-bar.tsx b/components/layout/window-menu-bar.tsx
index 1c39ff3b5..33e8f517e 100644
--- a/components/layout/window-menu-bar.tsx
+++ b/components/layout/window-menu-bar.tsx
@@ -372,7 +372,7 @@ export function WindowMenuBar() {
             aria-haspopup={isSub ? "menu" : undefined}
             aria-expanded={isSub ? opened : undefined}
             aria-disabled={item.enabled ? undefined : true}
-            aria-keyshortcuts={item.accelerator ? menuKeyText(item.accelerator, getDesktopBridge()?.platform) : undefined}
+            aria-keyshortcuts={item.accelerator ? menuKeyText(item.accelerator, getDesktopBridge()?.platform, 'en') : undefined}
             data-menu-line={index}
             tabIndex={-1}
             onMouseEnter={(event) => {
diff --git a/components/mail/__tests__/compose-plugin-hooks.test.tsx b/components/mail/__tests__/compose-plugin-hooks.test.tsx
index c7cb0c74f..8645e3d3e 100644
--- a/components/mail/__tests__/compose-plugin-hooks.test.tsx
+++ b/components/mail/__tests__/compose-plugin-hooks.test.tsx
@@ -3,6 +3,7 @@ import { act, fireEvent, render, screen, waitFor } from '@testing-library/react'
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
 import type { Mailbox } from '@/lib/jmap/types';
 import { useAuthStore } from '@/stores/auth-store';
+import { useAccountStore } from '@/stores/account-store';
 import { useEmailStore } from '@/stores/email-store';
 import { useSettingsStore } from '@/stores/settings-store';
 import { usePluginStore } from '@/stores/plugin-store';
@@ -211,6 +212,40 @@ describe('a mail link from another program in the desktop app', () => {
     expect(screen.queryByText('stub composer')).not.toBeInTheDocument();
   });
 
+  it('files from Send to or Open with go to a compose window too, attached, and the main window shows no composer', async () => {
+    const { handOffDraft } = await import('@/lib/launch-handoff');
+    render(<MailApp />);
+    const file = new File(['pdf'], 'report.pdf', { type: 'application/pdf' });
+    act(() => { handOffDraft({ files: [file], fromOs: true }); });
+    await waitFor(() => expect(desktopWindows.handOver).toHaveBeenCalledTimes(1));
+    expect(desktopWindows.handOver).toHaveBeenCalledWith(expect.objectContaining({ mode: 'compose', initialFiles: [file] }));
+    await act(() => new Promise((r) => setTimeout(r, 50)));
+    expect(screen.queryByText('stub composer')).not.toBeInTheDocument();
+  });
+
+  it('with two accounts it opens from the default one, in its own window, with no question', async () => {
+    const client = useAuthStore.getState().client;
+    useAuthStore.setState({ getAllConnectedClients: () => new Map([['login', client], ['second', client]]) as never });
+    useAccountStore.setState({
+      accounts: [
+        { id: 'login', email: 'me@example.com', isConnected: true, isDefault: false },
+        { id: 'second', email: 'work@example.com', isConnected: true, isDefault: true },
+      ],
+      defaultAccountId: 'second',
+    } as never);
+    try {
+      render(<MailApp />);
+      await fromOs();
+      await waitFor(() => expect(desktopWindows.handOver).toHaveBeenCalledTimes(1));
+      expect(desktopWindows.open).toHaveBeenCalledWith('second');
+      expect(screen.queryByText('select_account_title')).not.toBeInTheDocument();
+      // The main window keeps the account it shows.
+      expect(useAuthStore.getState().activeAccountId).toBe('login');
+    } finally {
+      useAccountStore.setState({ accounts: [], defaultAccountId: null } as never);
+    }
+  });
+
   it('a link inside the app still opens here', async () => {
     render(<MailApp />);
     act(() => { requestInternalMailto('mailto:bob@example.com?subject=Hi'); });
diff --git a/components/mail/__tests__/mail-app-menu-selection.test.tsx b/components/mail/__tests__/mail-app-menu-selection.test.tsx
new file mode 100644
index 000000000..9234ef35e
--- /dev/null
+++ b/components/mail/__tests__/mail-app-menu-selection.test.tsx
@@ -0,0 +1,183 @@
+import React from 'react';
+import { act, cleanup, render, waitFor } from '@testing-library/react';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import type { Email, Mailbox } from '@/lib/jmap/types';
+import { useAuthStore } from '@/stores/auth-store';
+import { useEmailStore } from '@/stores/email-store';
+import { useSettingsStore } from '@/stores/settings-store';
+import { usePluginStore } from '@/stores/plugin-store';
+import { useThemeStore } from '@/stores/theme-store';
+import { useToastStore } from '@/stores/toast-store';
+import { DEFAULT_SEARCH_FILTERS } from '@/lib/jmap/search-utils';
+import { resetDesktopCommands, runDesktopCommand } from '@/lib/desktop/commands';
+import { useMoveDialogStore } from '@/components/email/move-to-dialog';
+
+// The desktop app's Message menu with several messages selected: each line acts on all
+// of them, or isn't offered. Reply to one of seven, or Move for the open one only, acts on
+// mail nobody picked (usability pass 2, desktop-p2-3).
+
+const seen = vi.hoisted(() => ({ sourceEmailId: undefined as string | undefined }));
+
+
+vi.mock('@/components/email/email-composer', async () => {
+  const { useEffect, useRef, useState } = await import('react');
+  const { registerComposeFlush } = await import('@/lib/compose-flush-registry');
+  return {
+    EmailComposer: ({ initialData, onSaveState, onSend, sourceEmailId }: {
+      initialData?: { subject?: string; mode?: string } | null;
+      onSaveState: (data: { subject: string; mode?: string }) => void;
+      onSend: (data: { to: string[]; cc: string[]; bcc: string[]; subject: string; body: string }) => Promise<unknown>;
+      sourceEmailId?: string;
+    }) => {
+      seen.sourceEmailId = sourceEmailId;
+      useEffect(() => registerComposeFlush(async () => {}), []);
+      const [subject, setSubject] = useState(initialData?.subject ?? '');
+      const initial = useRef(subject);
+      const latest = useRef(subject);
+      latest.current = subject;
+      useEffect(() => () => {
+        if (latest.current !== initial.current) onSaveState({ subject: latest.current, mode: initialData?.mode });
+        // eslint-disable-next-line react-hooks/exhaustive-deps
+      }, []);
+      return (
+        <>
+          <input aria-label="stub subject" value={subject} onChange={(e) => setSubject(e.target.value)} />
+          <button onClick={() => void onSend({ to: ['a@example.org'], cc: [], bcc: [], subject, body: 'x' })}>stub send</button>
+        </>
+      );
+    },
+  };
+});
+vi.mock('@/components/layout/mv-top-bar', () => ({ MvTopBar: () => null }));
+vi.mock('@/components/layout/sidebar', () => ({ Sidebar: () => null }));
+vi.mock('@/components/search/mv-search-form', () => ({ MvSearchForm: () => null }));
+vi.mock('@/components/email/email-viewer', () => ({ EmailViewer: () => <div>message viewer</div> }));
+vi.mock('@/components/layout/navigation-rail', () => ({ NavigationRail: () => null }));
+vi.mock('@/components/layout/calendar-event-notification-toaster', () => ({ CalendarEventNotificationToaster: () => null }));
+vi.mock('@/components/layout/share-notification-toaster', () => ({ ShareNotificationToaster: () => null }));
+vi.mock('@/components/layout/mobile-header', () => ({ MobileHeader: () => null }));
+vi.mock('@/components/layout/mv-side-panel', () => ({ MvSidePanel: () => null }));
+vi.mock('@/components/email/message-list-tabs', () => ({ useMessageListPanelProps: (id: string) => ({ id }), MessageListTabs: () => null }));
+vi.mock('@/components/search/search-box', () => ({ SearchBox: () => null }));
+vi.mock('@/components/tour/tour-provider', () => ({ useTour: () => ({ activeTour: null, registerStep: vi.fn() }) }));
+vi.mock('@/components/plugins/plugin-slot', () => ({ PluginSlot: () => null }));
+vi.mock('@/hooks/use-plugin-slot-offers', () => ({ usePluginSlotOffers: () => [] }));
+vi.mock('@/hooks/use-config', () => ({ useConfig: () => ({ appName: 'Mail' }) }));
+vi.mock('@/hooks/use-identity-sync', () => ({ useIdentitySync: () => {} }));
+vi.mock('@/hooks/use-pro-multi-account-identities', () => ({ useProMultiAccountIdentities: () => [] }));
+vi.mock('@/hooks/use-pro-multi-account-mailboxes', () => ({ useProMultiAccountMailboxes: () => {} }));
+vi.mock('@/hooks/use-wopi-status', () => ({ useWopiStatus: () => null, canWopiOpen: () => false }));
+vi.mock('@/hooks/use-browser-navigation', () => ({ useBrowserNavigation: () => {} }));
+// A compact desktop: rail and folders beside the list, the composer in the pane.
+const device = vi.hoisted(() => ({ current: { isMobile: false, isCompact: true, isDesktop: true } }));
+vi.mock('@/hooks/use-media-query', () => ({
+  useDeviceDetection: () => device.current,
+  useMediaQuery: () => false,
+  useIsDesktop: () => true,
+  atLeast: (px: number) => `(width >= ${px}px)`,
+  PHONE_BELOW: 600,
+}));
+vi.mock('@/lib/push-bindings', () => ({ reconcilePushBindings: () => {}, releasePushBindings: () => {} }));
+vi.mock('@/components/email/email-list', () => ({ EmailList: () => <div>message list</div> }));
+
+const { MailApp } = await import('../mail-app');
+
+const inbox = { id: 'inbox', name: 'Inbox', role: 'inbox', totalEmails: 3, unreadEmails: 0, myRights: { mayRemoveItems: true, mayAddItems: true } } as unknown as Mailbox;
+const later = { id: 'later', name: 'Read later', role: null, totalEmails: 0, unreadEmails: 0, myRights: { mayRemoveItems: true, mayAddItems: true } } as unknown as Mailbox;
+const message = (id: string) => ({ id, threadId: `t-${id}`, subject: `Subject ${id}`, receivedAt: '2026-10-31T10:00:00Z', keywords: { $seen: true }, mailboxIds: { inbox: true } }) as unknown as Email;
+const [a, b, c] = ['a', 'b', 'c'].map(message);
+
+let reported: Record<string, unknown> = {};
+let named: string[] = [];
+let batchMoveToMailbox: ReturnType<typeof vi.fn>;
+
+beforeEach(() => {
+  vi.stubGlobal('fetch', vi.fn().mockRejectedValue(new Error('Unexpected network request')));
+  vi.stubGlobal('ResizeObserver', class { observe() {} unobserve() {} disconnect() {} });
+  vi.stubGlobal('matchMedia', vi.fn(() => ({ matches: false, addEventListener() {}, removeEventListener() {}, addListener() {}, removeListener() {} })));
+  reported = {};
+  named = [];
+  (window as unknown as { bulwarkDesktop: unknown }).bulwarkDesktop = {
+    version: 1,
+    platform: 'win32',
+    menu: { setState: (state: Record<string, unknown>) => { reported = state; }, onCommand: () => () => {} },
+    windows: { setMenuName: (name: string) => { named.push(name); } },
+  };
+  usePluginStore.setState({ initializePlugins: vi.fn().mockResolvedValue(undefined) });
+  useThemeStore.setState({ syncServerThemes: vi.fn().mockResolvedValue(undefined) });
+  const client = {
+    getAccountId: () => 'acc', getUsername: () => 'a@example.org',
+    getSieveAccountId: () => null, hasDelayedSend: () => false, getSession: () => null,
+  };
+  useAuthStore.setState({
+    isAuthenticated: true, isLoading: false, client: client as never, activeAccountId: 'login-a', identities: [],
+    getClientForAccount: () => client as never,
+    getAllConnectedClients: () => new Map([['login-a', client]]) as never,
+  });
+  useSettingsStore.setState({ enableUnifiedMailbox: false, interfaceLayout: 'default', mailLayout: 'split', proInterface: false } as never);
+  batchMoveToMailbox = vi.fn().mockResolvedValue(true);
+  useEmailStore.setState({
+    emails: [a, b, c], selectedEmail: a, selectedMailbox: 'inbox', selectedKeyword: null, mailboxes: [inbox, later],
+    viewingAccountId: null, accountMailboxes: {}, isUnifiedView: false, unifiedRole: null,
+    isScheduledView: false, isLoadingEmail: false, isLoading: false, searchQuery: '',
+    searchFilters: { ...DEFAULT_SEARCH_FILTERS }, searchMailboxId: '', isAdvancedSearchOpen: false,
+    selectedEmailKeys: new Set(['a', 'b', 'c']), unreadSection: null, threadEmailsCache: new Map(), error: null,
+    fetchMailboxes: vi.fn().mockResolvedValue(undefined), fetchEmails: vi.fn().mockResolvedValue(undefined),
+    fetchQuota: vi.fn().mockResolvedValue(undefined), fetchTagCounts: vi.fn().mockResolvedValue(undefined),
+    refreshScheduledMetadata: vi.fn().mockResolvedValue(undefined),
+    fetchEmailContent: vi.fn().mockResolvedValue(undefined),
+    refreshCurrentMailbox: vi.fn().mockResolvedValue(undefined),
+    batchMoveToMailbox,
+  } as never);
+});
+afterEach(() => {
+  cleanup();
+  resetDesktopCommands();
+  useMoveDialogStore.setState({ request: null });
+  delete (window as unknown as { bulwarkDesktop?: unknown }).bulwarkDesktop;
+  vi.restoreAllMocks();
+  vi.unstubAllGlobals();
+});
+
+describe('the Message menu with three messages selected', () => {
+  it('offers no Reply, Reply all, Forward or Star, which would act on one of them', async () => {
+    render(<MailApp />);
+    await waitFor(() => expect(reported['message.archive']).toBe(true));
+    expect(reported['message.reply']).toBe(false);
+    expect(reported['message.replyAll']).toBe(false);
+    expect(reported['message.forward']).toBe(false);
+    expect(reported['message.star']).toBe(false);
+    expect(reported['message.openWindow']).toBe(false);
+    expect(reported['message.move']).toBe(true);
+  });
+
+  it('Move to… moves all three, and the toast says how many', async () => {
+    render(<MailApp />);
+    await waitFor(() => expect(reported['message.move']).toBe(true));
+    act(() => { runDesktopCommand('message.move'); });
+    const request = useMoveDialogStore.getState().request;
+    expect(request?.emails.map((email) => email.id)).toEqual(['a', 'b', 'c']);
+    await act(async () => { request!.onMove('later'); });
+    await waitFor(() => expect(batchMoveToMailbox).toHaveBeenCalledWith(expect.anything(), 'later', undefined, expect.any(Array)));
+    await waitFor(() => expect(useToastStore.getState().toasts.map((toast) => toast.title)).toContain('moved_count_to'));
+  });
+
+  it('with one message open and none selected, Reply and Move are for that one', async () => {
+    useEmailStore.setState({ selectedEmailKeys: new Set() } as never);
+    render(<MailApp />);
+    await waitFor(() => expect(reported['message.reply']).toBe(true));
+    expect(reported['message.move']).toBe(true);
+    act(() => { runDesktopCommand('message.move'); });
+    expect(useMoveDialogStore.getState().request).toBeNull();
+    expect(batchMoveToMailbox).not.toHaveBeenCalled();
+  });
+});
+
+describe('the Window menu name of the main window', () => {
+  it('is the folder, not the message open in it, so it never reads like the window of that message', async () => {
+    useEmailStore.setState({ selectedEmailKeys: new Set() } as never);
+    render(<MailApp />);
+    await waitFor(() => expect(named.at(-1)).toBe('sidebar.mailboxes.inbox'));
+    expect(named).not.toContain('Subject a');
+  });
+});
diff --git a/components/mail/mail-app.tsx b/components/mail/mail-app.tsx
index bdc888cfc..ca0f59b53 100644
--- a/components/mail/mail-app.tsx
+++ b/components/mail/mail-app.tsx
@@ -145,7 +145,8 @@ import { deliveryAddresses, resolveComposeAccountEmail } from "@/lib/reply-ident
 import { useProMultiAccountIdentities } from "@/hooks/use-pro-multi-account-identities";
 import { Filter, X, Mail, MailOpen, PenSquare, CheckSquare, Square, AlertTriangle, ArrowLeft, RefreshCw, Reply, ReplyAll, Forward, Archive, Trash2, FolderInput, ShieldAlert, ShieldCheck, Folder, Upload, Star } from "@/components/icons";
 import { useRegisterCommands } from "@/lib/command-registry";
-import { MoveToDialog, MoveToDialogHost } from "@/components/email/move-to-dialog";
+import { MoveToDialog, MoveToDialogHost, useMoveDialogStore } from "@/components/email/move-to-dialog";
+import { useDesktopWindowName } from "@/lib/desktop/window-name";
 import { SearchResultCount } from "@/components/email/search-result-count";
 import { ResizeHandle } from "@/components/layout/resize-handle";
 import { Button } from "@/components/ui/button";
@@ -155,7 +156,7 @@ import { mailTitleContext } from "@/lib/tab-title";
 import { usePluginStore } from "@/stores/plugin-store";
 import { AppTopBannerSlot } from "@/components/plugins/app-top-banner-slot";
 import { canDownload } from "@/lib/device-policy";
-import { consumePendingMailto, subscribeToPendingMailto } from "@/lib/protocol-handlers/session";
+import { consumePendingMailto, mailLinkAccountId, subscribeToPendingMailto } from "@/lib/protocol-handlers/session";
 import { setNotificationReplyOpener } from "@/lib/pwa-notify/page-actions";
 import { setMailLinkOpener } from "@/lib/desktop/mail-links";
 import { requestTabReply } from "@/lib/pwa-notify/tab-reply";
@@ -1366,7 +1367,26 @@ export function MailApp({ linkSegments: routeSegments }: MailAppProps = {}) {
   // The desktop app's menu bar: the same handlers as the keys, and what's enabled
   // from what's on screen (lib/desktop/commands.ts).
   const desktopTarget = !showComposer && (!!selectedEmail || selectedEmailKeys.size > 0);
-  const desktopSingle = !showComposer && !!selectedEmail;
+  // With several selected, a menu line acts on all of them or isn't offered: Reply to one
+  // of seven, or Move for the open one only, would act on mail nobody picked.
+  const desktopMulti = selectedEmailKeys.size > 1;
+  const desktopSingle = !showComposer && !!selectedEmail && !desktopMulti;
+  const tListExtra = useTranslations('mail_list_extra');
+  /** Message > Move to… on the selection, as the selection bar's Move does: one toast with the count. */
+  const moveSelectionTo = async (mailboxId: string) => {
+    if (!client) return;
+    const count = selectedEmailKeys.size;
+    const restore = restoreBatchesForSelection(client);
+    const receipts: CrossAccountMoveReceipt[] = [];
+    const destination = mailboxes.find((m) => m.id === mailboxId);
+    await runBatchEmailAction(() => useEmailStore.getState().batchMoveToMailbox(client, mailboxId, undefined, receipts), {
+      success: destination
+        ? tListExtra('moved_count_to', { count, mailbox: getMailboxPath(destination, mailboxes) })
+        : tNotifications('emails_moved', { count }),
+      error: tNotifications('move_failed'),
+      undo: undoMoveAction(client, restore, undo, receipts),
+    });
+  };
   const mailLayoutSetting = useSettingsStore((s) => s.mailLayout);
   const layoutFixed = interfaceLayout === 'mountain-view';
   // A shared folder you may only read from: nothing can leave it.
@@ -1384,7 +1404,15 @@ export function MailApp({ linkSegments: routeSegments }: MailAppProps = {}) {
     'message.markRead': () => void keyboardHandlers.onMarkAsRead?.(),
     'message.markUnread': () => void keyboardHandlers.onMarkAsUnread?.(),
     'message.star': () => void keyboardHandlers.onToggleStar?.(),
-    'message.move': () => { if (selectedEmail) setMoveDialogEmail(selectedEmail); },
+    'message.move': () => {
+      if (shortcutsTargetSelection) {
+        const state = useEmailStore.getState();
+        const picked = resolveSelectedEmails({ emails: state.emails, threadEmailsCache: state.threadEmailsCache, selectedEmailKeys });
+        if (picked.length > 0) useMoveDialogStore.getState().open({ emails: picked, onMove: (mailboxId) => void moveSelectionTo(mailboxId) });
+      } else if (selectedEmail) {
+        setMoveDialogEmail(selectedEmail);
+      }
+    },
     'message.archive': keyboardHandlers.onArchive ? () => void keyboardHandlers.onArchive?.() : undefined,
     'message.spam': () => void keyboardHandlers.onToggleSpam?.(),
     'message.delete': () => void keyboardHandlers.onDelete?.(),
@@ -1408,7 +1436,7 @@ export function MailApp({ linkSegments: routeSegments }: MailAppProps = {}) {
     'message.markRead': desktopTarget && !(selectedEmail && selectedEmailKeys.size === 0 && selectedEmail.keywords?.$seen),
     'message.markUnread': desktopTarget && !(selectedEmail && selectedEmailKeys.size === 0 && !selectedEmail.keywords?.$seen),
     'message.star': desktopSingle,
-    'message.move': desktopSingle && desktopMayRemove,
+    'message.move': desktopTarget && desktopMayRemove,
     'message.archive': desktopTarget && archiveActionEnabled && desktopMayRemove,
     'message.spam': desktopTarget && desktopMayRemove,
     'message.delete': desktopTarget && desktopMayRemove,
@@ -1497,6 +1525,12 @@ export function MailApp({ linkSegments: routeSegments }: MailAppProps = {}) {
     return mailTitleContext({ composer, subject, mailbox: mailboxLine }, { showSubject: subjectInTabTitle });
   }, [showComposer, composerMode, selectedEmail, selectedMailbox, mailboxes, t, subjectInTabTitle]);
   useDocumentTitle(titleContext);
+  // The Window menu names this window by its folder, never by the open message (desktop-p2-5).
+  const windowView = useMemo(() => {
+    const mailbox = selectedMailbox ? mailboxes.find(mb => mb.id === selectedMailbox) : undefined;
+    return mailbox ? localizeMailboxName(mailbox.role, mailbox.name, (k) => t(`sidebar.mailboxes.${k}`)) : t('sidebar.mail');
+  }, [selectedMailbox, mailboxes, t]);
+  useDesktopWindowName(windowView, { withAccount: true });
 
   // When this page is rendered inside the Pro shell as the Mail tab body,
   // we hoist every "show composer" intent into its own Pro tab and reset
@@ -1682,8 +1716,8 @@ export function MailApp({ linkSegments: routeSegments }: MailAppProps = {}) {
   // A mail link from another program, in the desktop app: a compose window of its own,
   // as Outlook and Thunderbird do, and the main window stays where it was. Plugins get
   // their say first. False when it has to open here instead.
-  const openMailtoInWindow = useCallback(async (pending: DraftRequest): Promise<boolean> => {
-    if (!pending.fromOs || pending.initialFiles?.length || !hasDesktopWindows() || !popoutsAvailable()) return false;
+  const openMailtoInWindow = useCallback(async (pending: DraftRequest, accountId?: string): Promise<boolean> => {
+    if (!pending.fromOs || !hasDesktopWindows() || !popoutsAvailable()) return false;
     let prefill: ComposePrefill | null = null;
     if (emailHooks.onBeforeCompose.size > 0) {
       prefill = await runBeforeCompose(composeOptionsFor('compose', {
@@ -1695,12 +1729,15 @@ export function MailApp({ linkSegments: routeSegments }: MailAppProps = {}) {
       // A plugin said no: nothing opens, here or there.
       if (!prefill) return true;
     }
-    const opened = openComposerWindow(useAuthStore.getState().activeAccountId);
+    // The account the link goes out from, in its own window: the main window keeps the one it shows.
+    const opened = openComposerWindow(accountId ?? useAuthStore.getState().activeAccountId);
     if (!opened) return false;
     void opened.handOver({
       mode: 'compose',
       initialData: mailtoComposerDraft(pending, useSettingsStore.getState().plainTextMode),
       prefill: prefill && Object.keys(prefill).length > 0 ? prefill : null,
+      // Send to and Open with: the files go along (desktop-p2-6).
+      ...(pending.initialFiles?.length ? { initialFiles: pending.initialFiles } : {}),
     });
     return true;
   }, [identities, t]);
@@ -1732,6 +1769,10 @@ export function MailApp({ linkSegments: routeSegments }: MailAppProps = {}) {
   }, [openMailtoInWindow, openMailtoHere]);
 
   const openMailtoForAccount = useCallback(async (pending: DraftRequest, accountId: string) => {
+    if (await openMailtoInWindow(pending, accountId)) {
+      setPendingMailtoAccountChoice(null);
+      return;
+    }
     setIsProtocolAccountSwitching(true);
     try {
       if (useAuthStore.getState().activeAccountId !== accountId) {
@@ -1742,7 +1783,7 @@ export function MailApp({ linkSegments: routeSegments }: MailAppProps = {}) {
     } finally {
       setIsProtocolAccountSwitching(false);
     }
-  }, [openMailtoDraft, switchAccount]);
+  }, [openMailtoDraft, openMailtoInWindow, switchAccount]);
 
   // onMailtoIntercept: a plugin may stop a mailto: from opening the composer.
   const mailtoAllowed = useCallback(async (pending: ParsedMailto & { href?: string }): Promise<boolean> => {
@@ -1755,17 +1796,10 @@ export function MailApp({ linkSegments: routeSegments }: MailAppProps = {}) {
     });
   }, []);
 
-  // A draft that comes from outside: which account it goes out from.
+  // A draft that comes from outside goes out from the default account, as in Outlook and
+  // Thunderbird, with no question: the composer's From changes it (desktop-p2-8).
   const routeOutsideDraft = useCallback(async (pending: DraftRequest): Promise<void> => {
-    const protocolAccounts = getMailtoProtocolAccounts();
-    if (protocolAccounts.length > 1) {
-      // The question is asked in this window: bring it up.
-      if (pending.fromOs) getDesktopBridge()?.windows?.focus?.();
-      setPendingMailtoAccountChoice(pending);
-      return;
-    }
-
-    const accountId = protocolAccounts[0]?.id ?? activeAccountId;
+    const accountId = mailLinkAccountId(getMailtoProtocolAccounts(), useAccountStore.getState().defaultAccountId, activeAccountId);
     if (accountId) {
       await openMailtoForAccount(pending, accountId);
       return;
@@ -1823,6 +1857,7 @@ export function MailApp({ linkSegments: routeSegments }: MailAppProps = {}) {
         body: handoff.body ?? '',
         initialFiles: handoff.files,
         unedited: true,
+        ...(handoff.fromOs ? { fromOs: true } : {}),
       });
     };
 
diff --git a/components/popout/popout-compose-app.tsx b/components/popout/popout-compose-app.tsx
index 5f8f5433b..3670f4c83 100644
--- a/components/popout/popout-compose-app.tsx
+++ b/components/popout/popout-compose-app.tsx
@@ -5,6 +5,7 @@ import { useTranslations } from "next-intl";
 import { EmailComposer, type ComposerDraftData } from "@/components/email/email-composer";
 import { ErrorBoundary, ComposerErrorFallback } from "@/components/error";
 import { useDocumentTitle } from "@/hooks/use-document-title";
+import { useDesktopWindowName } from "@/lib/desktop/window-name";
 import { useAccountStore } from "@/stores/account-store";
 import { useAuthStore } from "@/stores/auth-store";
 import { useEmailStore } from "@/stores/email-store";
@@ -313,6 +314,9 @@ function PopoutComposer({ payload, handoffId, onReopen }: {
   const [sessionKey] = useState(() => `popout-${handoffId ?? Date.now().toString(36)}`);
 
   const mode = payload.initialData?.mode ?? payload.mode;
+  // The Window menu names a composer by its subject, or "New message" before there is one.
+  const [subject, setSubject] = useState(payload.initialData?.subject ?? "");
+  useDesktopWindowName(subject.trim() || t("email_composer.new_message"));
   useDocumentTitle(
     mode === "reply" ? t("email_composer.reply")
       : mode === "replyAll" ? t("email_composer.reply_all")
@@ -512,6 +516,7 @@ function PopoutComposer({ payload, handoffId, onReopen }: {
         replyTo={payload.replyTo}
         initialDraftText={payload.initialDraftText}
         initialData={payload.initialData}
+        initialFiles={payload.initialFiles ?? null}
         prefill={payload.prefill}
         sessionKey={sessionKey}
         sourceEmailId={payload.sourceEmailId ?? undefined}
@@ -523,6 +528,7 @@ function PopoutComposer({ payload, handoffId, onReopen }: {
         ownWindow={ownWindow}
         popOut={mainHoldsLogin ? backToMain : undefined}
         popOutToMainLabel={mainHoldsLogin ? tQuick("back_to_main") : undefined}
+        onSubjectChange={setSubject}
         className="min-h-0 flex-1"
       />
     </ErrorBoundary>
diff --git a/components/popout/popout-message-app.tsx b/components/popout/popout-message-app.tsx
index 0c68ce71a..80d81fb16 100644
--- a/components/popout/popout-message-app.tsx
+++ b/components/popout/popout-message-app.tsx
@@ -5,6 +5,7 @@ import { useTranslations } from "next-intl";
 import { Button } from "@/components/ui/button";
 import { ProEmailView } from "@/components/pro/pro-email-tab-body";
 import { useDocumentTitle } from "@/hooks/use-document-title";
+import { useDesktopWindowName } from "@/lib/desktop/window-name";
 import { useAuthStore } from "@/stores/auth-store";
 import { useEmailStore } from "@/stores/email-store";
 import { usePolicyStore } from "@/stores/policy-store";
@@ -105,6 +106,8 @@ function PopoutMessage({ emailId, accountId, ownerAccountId, fromLink }: { email
   const [subject, setSubject] = useState<string | null>(null);
   const subjectInTitle = usePolicyStore((s) => s.loaded && s.isFeatureEnabled("tabTitleSubjectEnabled"));
   useDocumentTitle(subjectInTitle ? subject : null);
+  // Kept out where the organisation keeps subjects out of titles: the shell then says "Message".
+  useDesktopWindowName(subjectInTitle ? subject : null);
 
   // Folders first: without them Delete has no Trash to move to, Archive has no
   // button yet, and the toolbar moves under the pointer once they arrive.
diff --git a/components/protocol/protocol-account-picker.tsx b/components/protocol/protocol-account-picker.tsx
index 9bc672a4a..bb594ce9e 100644
--- a/components/protocol/protocol-account-picker.tsx
+++ b/components/protocol/protocol-account-picker.tsx
@@ -167,7 +167,7 @@ export function ProtocolAccountPicker({
               {t("switching_account")}
             </span>
           ) : (
-            <span className="text-xs text-muted-foreground">{t("select_account_note")}</span>
+            <span />
           )}
           <button
             type="button"
diff --git a/components/settings/__tests__/notification-settings.test.tsx b/components/settings/__tests__/notification-settings.test.tsx
index 0913b7204..157ac58a2 100644
--- a/components/settings/__tests__/notification-settings.test.tsx
+++ b/components/settings/__tests__/notification-settings.test.tsx
@@ -256,3 +256,26 @@ describe('NotificationSettings - push errors', () => {
     expect(text).toBe('Relay register failed: 502');
   });
 });
+
+describe('NotificationSettings - the unread count in the desktop app', () => {
+  beforeEach(() => {
+    useSettingsStore.setState({ emailNotificationsEnabled: true });
+    useAuthStore.setState({ client: fakeClient, username: 'me@example.com' });
+    usePolicyStore.setState({ ...usePolicyStore.getState(), policy: {}, isSettingLocked: () => false, isSettingHidden: () => false } as never);
+  });
+  afterEach(() => {
+    delete (window as unknown as { bulwarkDesktop?: unknown }).bulwarkDesktop;
+  });
+
+  it('speaks of the taskbar icon there, not of a tab', async () => {
+    (window as unknown as { bulwarkDesktop: unknown }).bulwarkDesktop = { version: 1, platform: 'win32' };
+    const { findByText, queryByText } = render(<NotificationSettings />);
+    await findByText('unread_badge_label');
+    expect(queryByText('favicon_unread_badge.label')).toBeNull();
+  });
+
+  it('keeps the tab in a browser', async () => {
+    const { findByText } = render(<NotificationSettings />);
+    await findByText('favicon_unread_badge.label');
+  });
+});
diff --git a/components/settings/desktop-os-settings.tsx b/components/settings/desktop-os-settings.tsx
index cd3851cca..9213d62e0 100644
--- a/components/settings/desktop-os-settings.tsx
+++ b/components/settings/desktop-os-settings.tsx
@@ -5,16 +5,10 @@ import { useTranslations } from "next-intl";
 import { Button } from "@/components/ui/button";
 import { getDesktopBridge } from "@/lib/desktop/bridge";
 import type { DesktopOsDefaultAppStatus, DesktopOsSettings as Settings, DesktopOsStatus } from "@/lib/desktop/types";
+import { describeAccelerator, showShortcutDefault } from "@/lib/desktop/shortcut-keys";
 import { DesktopQuickComposeSetting } from "./desktop-quick-compose-setting";
 import { SettingItem, SettingsSection, ToggleSwitch } from "./settings-section";
 
-/** On Windows and Linux this is what a press of the keys shows; macOS maps it to Cmd. */
-const SHOW_SHORTCUT = "CommandOrControl+Shift+B";
-
-function shortcutLabel(platform: string | undefined): string {
-  return platform === "darwin" ? "⇧⌘B" : "Ctrl+Shift+B";
-}
-
 /**
  * The desktop app's own settings: only where there's an app to set. A browser never sees
  * them, and they render nothing until the bridge has answered. The General page has how
@@ -46,6 +40,8 @@ export function DesktopOsSettings({ part = "app" }: { part?: "app" | "notificati
 
   if (!os || !status) return null;
   const { settings } = status;
+  const platform = bridge?.platform;
+  const showKeys = describeAccelerator(settings.showShortcut ?? showShortcutDefault(platform), platform);
   const change = (patch: Partial<Settings>) => {
     void os.setSettings(patch).then(setStatus);
   };
@@ -103,12 +99,12 @@ export function DesktopOsSettings({ part = "app" }: { part?: "app" | "notificati
       <SettingItem
         label={t("show_shortcut_label")}
         description={settings.showShortcut && !status.shortcutActive
-          ? t("show_shortcut_taken", { keys: shortcutLabel(bridge?.platform) })
-          : t("show_shortcut_description", { keys: shortcutLabel(bridge?.platform) })}
+          ? t("show_shortcut_taken", { keys: showKeys })
+          : t("show_shortcut_description", { keys: showKeys })}
       >
         <ToggleSwitch
           checked={!!settings.showShortcut}
-          onChange={(on) => change({ showShortcut: on ? SHOW_SHORTCUT : null })}
+          onChange={(on) => change({ showShortcut: on ? showShortcutDefault(platform) : null })}
         />
       </SettingItem>
       {status.quickCompose && (
diff --git a/components/settings/notification-settings.tsx b/components/settings/notification-settings.tsx
index d54f08011..27a8562d9 100644
--- a/components/settings/notification-settings.tsx
+++ b/components/settings/notification-settings.tsx
@@ -33,6 +33,7 @@ import {
 import { webPushErrorKey } from '@/lib/web-push-errors';
 import type { PushDevice } from '@/lib/web-push';
 import { IS_LITE } from '@/lib/lite';
+import { isDesktopApp } from '@/lib/desktop/bridge';
 import { useNoThirdPartyTraffic } from '@/hooks/use-third-party-mode';
 import {
   resolveActiveRelayUrl,
@@ -55,6 +56,7 @@ type DevicesState =
 export function NotificationSettings() {
   const t = useTranslations('settings.notifications');
   const tAppearance = useTranslations('settings.appearance');
+  const tDesktopP2 = useTranslations('uxp2_desktop');
   const tUnread = useTranslations('account_unread');
   const severalAccounts = useAccountStore((s) => s.accounts.length > 1);
   const tThirdParty = useTranslations('third_party');
@@ -354,8 +356,11 @@ export function NotificationSettings() {
         </SettingItem>
         )}
 
-        {/* The tab/app icon badge is a new-mail signal too; people look for it here. */}
-        <SettingItem label={tAppearance('favicon_unread_badge.label')} description={tAppearance('favicon_unread_badge.description')}>
+        {/* The tab/app icon badge is a new-mail signal too; people look for it here. The desktop app has no tab: the taskbar icon. */}
+        <SettingItem
+          label={isDesktopApp() ? tDesktopP2('unread_badge_label') : tAppearance('favicon_unread_badge.label')}
+          description={isDesktopApp() ? tDesktopP2('unread_badge_description') : tAppearance('favicon_unread_badge.description')}
+        >
           <ToggleSwitch
             checked={faviconUnreadBadge}
             onChange={(checked) => updateSetting('faviconUnreadBadge', checked)}
diff --git a/components/settings/settings-app.tsx b/components/settings/settings-app.tsx
index 4e4a21d55..e0d617729 100644
--- a/components/settings/settings-app.tsx
+++ b/components/settings/settings-app.tsx
@@ -95,6 +95,7 @@ import { useAccountStore } from '@/stores/account-store';
 import { useMediaQuery, atLeast, PHONE_BELOW } from '@/hooks/use-media-query';
 import { useLiteLinkSegments } from '@/hooks/use-lite-link-segments';
 import { useDocumentTitle } from '@/hooks/use-document-title';
+import { useDesktopWindowName } from '@/lib/desktop/window-name';
 import { MvTopBar } from "@/components/layout/mv-top-bar";
 import { useMountainViewShell } from "@/hooks/use-mountain-view-shell";
 import { scrollBehavior } from '@/lib/reduced-motion';
@@ -816,6 +817,7 @@ export function SettingsApp({ linkSegments: routeSegments }: SettingsAppProps =
       ? `${activeTabLabel} - ${tSidebar('settings')}`
       : tSidebar('settings'),
   );
+  useDesktopWindowName(tSidebar('settings'), { withAccount: true });
 
   const handleTabSelect = (tabId: SettingsTabId) => {
     setActiveTab(tabId);
diff --git a/components/ui/__tests__/welcome-banner.test.tsx b/components/ui/__tests__/welcome-banner.test.tsx
index 2ff6b50fb..3af02db83 100644
--- a/components/ui/__tests__/welcome-banner.test.tsx
+++ b/components/ui/__tests__/welcome-banner.test.tsx
@@ -27,6 +27,19 @@ describe('WelcomeBanner tips', () => {
     expect(screen.getByText('tip_shortcuts')).toBeInTheDocument();
   });
 
+  it('in the desktop app, names the keys it answers: Ctrl+N and Ctrl+K, not c', () => {
+    device.isMobile = false;
+    (window as unknown as { bulwarkDesktop: unknown }).bulwarkDesktop = { version: 1, platform: 'win32' };
+    try {
+      render(<WelcomeBanner />);
+      expect(screen.getByText('tip_compose_keys')).toBeInTheDocument();
+      expect(screen.getByText('tip_palette_keys')).toBeInTheDocument();
+      expect(screen.queryByText('tip_compose')).toBeNull();
+    } finally {
+      delete (window as unknown as { bulwarkDesktop?: unknown }).bulwarkDesktop;
+    }
+  });
+
   it('gives touch tips on a phone', () => {
     device.isMobile = true;
     render(<WelcomeBanner />);
diff --git a/components/ui/welcome-banner.tsx b/components/ui/welcome-banner.tsx
index 1b2a9b5cb..3c135ce11 100644
--- a/components/ui/welcome-banner.tsx
+++ b/components/ui/welcome-banner.tsx
@@ -9,6 +9,8 @@ import { useRouter } from "@/i18n/navigation";
 import { useTour } from "@/components/tour/tour-provider";
 import { useSettingsStore } from "@/stores/settings-store";
 import { useDeviceDetection } from "@/hooks/use-media-query";
+import { isDesktopApp } from "@/lib/desktop/bridge";
+import { formatShortcutCombo } from "@/lib/shortcut-keys";
 
 const ONBOARDING_KEY = "onboarding_completed";
 
@@ -38,6 +40,7 @@ export function useWelcomeBannerDue(): boolean {
  */
 export function WelcomeBanner({ variant = "list" }: { variant?: "list" | "pane" }) {
   const t = useTranslations("welcome");
+  const tDesktop = useTranslations("uxp2_desktop");
   const router = useRouter();
   const { startTour } = useTour();
   const onboardingCompleted = useSettingsStore((s) => s.onboardingCompleted);
@@ -113,7 +116,9 @@ export function WelcomeBanner({ variant = "list" }: { variant?: "list" | "pane"
                 {t("title")}
               </h3>
               <ul className="space-y-1 text-sm text-muted-foreground">
-                <li>{isMobile ? t("tip_compose_touch") : t("tip_compose")}</li>
+                {/* The desktop app answers the keys Windows mail apps use, not single letters (desktop-p2-12). */}
+                <li>{isMobile ? t("tip_compose_touch") : isDesktopApp() ? tDesktop("tip_compose_keys", { keys: formatShortcutCombo("Mod + N") }) : t("tip_compose")}</li>
+                {!isMobile && isDesktopApp() && <li>{tDesktop("tip_palette_keys", { keys: formatShortcutCombo("Mod + K") })}</li>}
                 {!isMobile && <li>{t("tip_shortcuts")}</li>}
                 <li>{isMobile ? t("tip_sidebar_touch") : t("tip_sidebar")}</li>
                 <li>{t("tip_settings")}</li>
diff --git a/lib/__tests__/desktop-shortcut-keys.test.ts b/lib/__tests__/desktop-shortcut-keys.test.ts
index ffe0fd0be..672a63395 100644
--- a/lib/__tests__/desktop-shortcut-keys.test.ts
+++ b/lib/__tests__/desktop-shortcut-keys.test.ts
@@ -15,6 +15,7 @@ describe('the shortcut help in the desktop app', () => {
     expect(shortcutKeyFor(row('shortcuts.actions.reply'), 'windows')).toBe('Mod + R / r');
     expect(shortcutKeyFor(row('shortcuts.actions.reply_all'), 'linux')).toBe('Mod + Shift + R / R / a');
     expect(shortcutKeyFor(row('shortcuts.actions.forward'), 'mac')).toBe('Mod + Shift + F / f');
+    expect(shortcutKeyFor(row('shortcuts.actions.forward'), 'windows')).toBe('Ctrl + F / Ctrl + Shift + F / f');
     expect(shortcutKeyFor(row('shortcuts.global.search'), 'windows')).toBe('Ctrl + E / /');
     expect(shortcutKeyFor(row('shortcuts.global.refresh'), 'windows')).toBe('F9 / F5 / Shift + G');
   });
diff --git a/lib/__tests__/send-error-wording.test.ts b/lib/__tests__/send-error-wording.test.ts
new file mode 100644
index 000000000..24889f8dd
--- /dev/null
+++ b/lib/__tests__/send-error-wording.test.ts
@@ -0,0 +1,14 @@
+import { readdirSync, readFileSync } from 'node:fs';
+import { join } from 'node:path';
+import { describe, expect, it } from 'vitest';
+
+// "Not sent - the server rejected every recipient." read as a hyphen where a colon belongs
+// (usability pass 2, desktop-p2-18).
+const LOCALES = join(process.cwd(), 'locales');
+
+describe('the send error for refused recipients', () => {
+  it.each(readdirSync(LOCALES))('%s: no hyphen standing in for a dash or colon', (locale) => {
+    const messages = JSON.parse(readFileSync(join(LOCALES, locale, 'common.json'), 'utf8'));
+    expect(messages.email_composer.send_recipients_rejected).not.toContain(' - ');
+  });
+});
diff --git a/lib/__tests__/shortcut-keys.test.ts b/lib/__tests__/shortcut-keys.test.ts
index db7319ac3..eb0f927eb 100644
--- a/lib/__tests__/shortcut-keys.test.ts
+++ b/lib/__tests__/shortcut-keys.test.ts
@@ -13,6 +13,25 @@ describe('shortcut notation', () => {
     expect(formatShortcutCombo('Ctrl+Shift+Y', false)).toBe('Ctrl+Shift+Y');
   });
 
+  it('names keys the way Windows does in the app\'s language, and a Mac keeps its symbols', () => {
+    expect(formatShortcutCombo('Mod + Shift + R', false, 'de')).toBe('Strg + Umschalt + R');
+    expect(formatShortcutCombo('Shift + Mod + Enter', false, 'de-AT')).toBe('Umschalt + Strg + Eingabe');
+    expect(shortcutAlternatives('# / Del', false, 'de')).toEqual(['#', 'Entf']);
+    expect(formatShortcutCombo('Alt + Shift + N', false, 'fr')).toBe('Alt + Maj + N');
+    expect(formatShortcutCombo('Mod + Shift + R', true, 'de')).toBe('⌘ + Shift + R');
+    expect(formatShortcutCombo('Mod + Shift + R', false, 'nl')).toBe('Ctrl + Shift + R');
+    expect(formatShortcutCombo('Mod + Shift + R', false, 'en')).toBe('Ctrl + Shift + R');
+  });
+
+  it('follows the app\'s language when none is given', () => {
+    document.documentElement.lang = 'de';
+    try {
+      expect(formatShortcutCombo('Mod + K', false)).toBe('Strg + K');
+    } finally {
+      document.documentElement.lang = '';
+    }
+  });
+
   it('splits alternatives', () => {
     expect(shortcutAlternatives('j / ↓', false)).toEqual(['j', '↓']);
     expect(shortcutAlternatives('Mod + A', true)).toEqual(['⌘ + A']);
diff --git a/lib/__tests__/window-controls-host.test.tsx b/lib/__tests__/window-controls-host.test.tsx
index ee7075b60..416ccd5ed 100644
--- a/lib/__tests__/window-controls-host.test.tsx
+++ b/lib/__tests__/window-controls-host.test.tsx
@@ -278,6 +278,14 @@ describe('the menu bar in the desktop app', () => {
     expect(menuKeyText('?', 'win32')).toBe('?');
     expect(menuKeyText('CommandOrControl+Shift+Z', 'win32')).toBe('Ctrl+Shift+Z');
   });
+
+  it('and in the app\'s language, as German Windows writes them', () => {
+    expect(menuKeyText('CmdOrCtrl+Shift+R', 'win32', 'de')).toBe('Strg+Umschalt+R');
+    expect(menuKeyText('Delete', 'win32', 'de')).toBe('Entf');
+    expect(menuKeyText('CmdOrCtrl+Enter', 'linux', 'de')).toBe('Strg+Eingabe');
+    expect(menuKeyText('Alt+Left', 'win32', 'de')).toBe('Alt+←');
+    expect(menuKeyText('Delete', 'win32', 'fr')).toBe('Suppr');
+  });
 });
 
 describe('the window controls over the app', () => {
@@ -348,6 +356,32 @@ describe('the window controls over the app', () => {
     expect(root.hasAttribute(CONTROLS_ATTRIBUTE)).toBe(false);
     expect(rightInset()).toBe('');
   });
+
+  describe('when the window changes size in one step', () => {
+    const startWidth = window.innerWidth;
+    const setWidth = (width: number) => Object.defineProperty(window, 'innerWidth', { value: width, configurable: true, writable: true });
+    afterEach(() => setWidth(startWidth));
+
+    // As Chromium does it: geometrychange with the new rect while the page still has
+    // its old width, then the page takes the new width and fires resize.
+    const resizeTo = (fake: EventTarget, width: number) => act(() => {
+      (fake as unknown as { getTitlebarAreaRect: () => object }).getTitlebarAreaRect = () => ({ x: 0, y: 0, width: width - 137, height: 56 });
+      fake.dispatchEvent(new Event('geometrychange'));
+      setWidth(width);
+      window.dispatchEvent(new Event('resize'));
+    });
+
+    it('keeps the room for the controls after a maximise, a restore, a snap and a shrink', () => {
+      setWidth(1366);
+      const fake = overlayAt(0, 1366 - 137);
+      render(<WindowControlsHost />);
+      expect(rightInset()).toBe('137px');
+      for (const width of [2048, 1366, 1024, 640, 1920]) {
+        resizeTo(fake, width);
+        expect(rightInset(), `at ${width} px`).toBe('137px');
+      }
+    });
+  });
 });
 
 describe('which rows hold the controls', () => {
diff --git a/lib/desktop/__tests__/os-commands.test.ts b/lib/desktop/__tests__/os-commands.test.ts
index 730477814..cd724ed85 100644
--- a/lib/desktop/__tests__/os-commands.test.ts
+++ b/lib/desktop/__tests__/os-commands.test.ts
@@ -132,6 +132,12 @@ describe('launches', () => {
     expect(takeHandoff('compose')?.files.map((file) => file.name)).toEqual(['a.pdf', 'b.png']);
   });
 
+  it('files sent from another program are marked so, for a compose window of their own, as a mail link', async () => {
+    const { takeHandoff } = await import('@/lib/launch-handoff');
+    await run({ type: 'files', reason: 'attach', failed: [], files: [{ name: 'a.pdf', data: text('a') }] });
+    expect(takeHandoff('compose')).toMatchObject({ fromOs: true });
+  });
+
   it('a file opened with the app asks: new message or Files, a new message first', async () => {
     const { takeHandoff } = await import('@/lib/launch-handoff');
     const { listenForFileChoices } = await import('@/lib/file-drop/choice');
diff --git a/lib/desktop/__tests__/os-window.test.tsx b/lib/desktop/__tests__/os-window.test.tsx
index 84c346fcb..d7f06d8c7 100644
--- a/lib/desktop/__tests__/os-window.test.tsx
+++ b/lib/desktop/__tests__/os-window.test.tsx
@@ -290,6 +290,15 @@ describe('the summary', () => {
     expect(nextEventOf([event('past', '2026-11-03T09:00:00Z')], now)).toBeNull();
   });
 
+  it('the event\'s time follows the app\'s time format, not the language\'s', async () => {
+    const { formatEventTime } = await import('../os-summary');
+    const at = new Date(2026, 10, 3, 11, 0).getTime();
+    const morning = new Date(2026, 10, 3, 8, 0).getTime();
+    expect(formatEventTime(at, morning, 'en-US', '24h')).toBe('11:00');
+    expect(formatEventTime(at, morning, 'en-US', '12h')).toMatch(/^11:00\sAM$/);
+    expect(formatEventTime(new Date(2026, 10, 3, 9, 5).getTime(), morning, 'en-US', '24h')).toBe('09:05');
+  });
+
   describe('with a login', () => {
     const row = { id: 'e1', threadId: 't1', subject: 'Lunch?', from: [{ name: 'Alice', email: 'a@example.org' }] };
     const getEmails = vi.fn(async () => ({ emails: [row], hasMore: false, total: 1 }));
@@ -422,6 +431,17 @@ describe('the settings section', () => {
     await waitFor(() => expect(os.openDefaultAppSettings).toHaveBeenCalled());
   });
 
+  it('switching "Show the app" on takes a key the composer doesn\'t use', async () => {
+    const { DesktopOsSettings } = await import('@/components/settings/desktop-os-settings');
+    const os = bridgeFor(status());
+    setBridge(os as never);
+    render(<DesktopOsSettings />);
+    expect(await screen.findByText('show_shortcut_label')).toBeInTheDocument();
+    // Close to tray, start with the computer, then this one.
+    fireEvent.click(screen.getAllByRole('switch')[2]);
+    await waitFor(() => expect(os.setSettings).toHaveBeenCalledWith({ showShortcut: 'CommandOrControl+Alt+F11' }));
+  });
+
   it('says when another app holds the shortcut', async () => {
     const { DesktopOsSettings } = await import('@/components/settings/desktop-os-settings');
     setBridge(bridgeFor(status({ showShortcut: 'CommandOrControl+Shift+B' })) as never);
diff --git a/lib/desktop/__tests__/shell-labels.test.ts b/lib/desktop/__tests__/shell-labels.test.ts
index 563c194d4..57b874146 100644
--- a/lib/desktop/__tests__/shell-labels.test.ts
+++ b/lib/desktop/__tests__/shell-labels.test.ts
@@ -37,6 +37,11 @@ describe('the labels the desktop shell gets', () => {
     }
   });
 
+  it('names File > Unlock, which the menus offer while the app is locked', () => {
+    expect(labelsFor('de').labels.menuUnlock).toBe('Entsperren');
+    expect(labelsFor('en').labels.menuUnlock).toBe('Unlock');
+  });
+
   it.each(LOCALES)('%s: leaves the shell its placeholders to fill in', (locale) => {
     const { labels } = labelsFor(locale);
     expect(labels.contextAddToDictionary).toContain('{word}');
diff --git a/lib/desktop/__tests__/shortcut-keys.test.ts b/lib/desktop/__tests__/shortcut-keys.test.ts
index 423225010..e3e54d6b4 100644
--- a/lib/desktop/__tests__/shortcut-keys.test.ts
+++ b/lib/desktop/__tests__/shortcut-keys.test.ts
@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest';
-import { describeAccelerator, readShortcutPress, shortcutProblem, type ShortcutKeyEvent } from '../shortcut-keys';
+import { describeAccelerator, readShortcutPress, shortcutProblem, showShortcutDefault, type ShortcutKeyEvent } from '../shortcut-keys';
 
 const press = (key: string, code: string, modifiers: Partial<ShortcutKeyEvent> = {}): ShortcutKeyEvent => ({
   key,
@@ -27,6 +27,14 @@ describe('describeAccelerator', () => {
   });
 });
 
+describe('describeAccelerator in the app\'s language', () => {
+  it('says Strg and Umschalt in German, and keeps a Mac\'s symbols', () => {
+    expect(describeAccelerator('CommandOrControl+Alt+F11', 'win32', 'de')).toBe('Strg+Alt+F11');
+    expect(describeAccelerator('CommandOrControl+Shift+Enter', 'linux', 'de')).toBe('Strg+Umschalt+Eingabe');
+    expect(describeAccelerator('CommandOrControl+Shift+B', 'darwin', 'de')).toBe('⇧⌘B');
+  });
+});
+
 describe('readShortcutPress', () => {
   it('turns a press into what the shell takes', () => {
     expect(readShortcutPress(press('n', 'KeyN', CTRL_ALT), 'win32')).toEqual({ accelerator: 'CommandOrControl+Alt+N' });
@@ -108,4 +116,17 @@ describe('shortcutProblem', () => {
     expect(shortcutProblem('CommandOrControl+Control+N', 'win32')).toBe('incomplete');
     expect(shortcutProblem('CommandOrControl+Control+N', 'darwin')).toBeNull();
   });
+
+  it('refuses the app\'s own keys: a global one would take them from the composer and the menus', () => {
+    for (const keys of ['CommandOrControl+Shift+B', 'CommandOrControl+Shift+C', 'CommandOrControl+Shift+Enter', 'CommandOrControl+Shift+M', 'CommandOrControl+Shift+N', 'CommandOrControl+Shift+S', 'CommandOrControl+Shift+R', 'CommandOrControl+Shift+F']) {
+      for (const platform of ['win32', 'darwin', 'linux']) expect(shortcutProblem(keys, platform), `${keys} on ${platform}`).toBe('reserved');
+    }
+    expect(readShortcutPress(press('B', 'KeyB', { ctrlKey: true, shiftKey: true }), 'win32')).toEqual({ refused: 'reserved' });
+  });
+
+  it('"Show the app" by default is none of them, and on Windows types nothing with AltGr', () => {
+    for (const platform of ['win32', 'darwin', 'linux']) expect(shortcutProblem(showShortcutDefault(platform), platform)).toBeNull();
+    expect(showShortcutDefault('win32')).toBe('CommandOrControl+Alt+F11');
+    expect(showShortcutDefault('linux')).toBe('CommandOrControl+Alt+B');
+  });
 });
diff --git a/lib/desktop/__tests__/window-name.test.tsx b/lib/desktop/__tests__/window-name.test.tsx
new file mode 100644
index 000000000..2dd5a4c51
--- /dev/null
+++ b/lib/desktop/__tests__/window-name.test.tsx
@@ -0,0 +1,41 @@
+import { cleanup, render } from '@testing-library/react';
+import { afterEach, describe, expect, it } from 'vitest';
+import { useDesktopWindowName, windowMenuName } from '../window-name';
+import { useAccountStore } from '@/stores/account-store';
+
+// The desktop app's Window menu: each window by what it shows (usability pass 2, desktop-p2-5).
+
+function Named({ view, withAccount }: { view: string | null; withAccount?: boolean }) {
+  useDesktopWindowName(view, { withAccount });
+  return null;
+}
+
+afterEach(() => {
+  cleanup();
+  delete (window as unknown as { bulwarkDesktop?: unknown }).bulwarkDesktop;
+});
+
+describe('the Window menu name', () => {
+  it('is the view and the account for the main window, the view alone otherwise', () => {
+    expect(windowMenuName('Inbox', 'a@example.org')).toBe('Inbox - a@example.org');
+    expect(windowMenuName('Quarterly budget', null)).toBe('Quarterly budget');
+    expect(windowMenuName('  ', null)).toBeNull();
+  });
+
+  it('goes to the shell, with the account in view, and again when it changes', () => {
+    const named: string[] = [];
+    (window as unknown as { bulwarkDesktop: unknown }).bulwarkDesktop = { version: 1, platform: 'win32', windows: { setMenuName: (name: string) => named.push(name) } };
+    useAccountStore.setState({ accounts: [{ id: 'acc-1', email: 'a@example.org' }], activeAccountId: 'acc-1' } as never);
+    const { rerender } = render(<Named view="Inbox" withAccount />);
+    expect(named).toEqual(['Inbox - a@example.org']);
+    rerender(<Named view="Sent" withAccount />);
+    expect(named).toEqual(['Inbox - a@example.org', 'Sent - a@example.org']);
+    rerender(<Named view="A subject" />);
+    expect(named.at(-1)).toBe('A subject');
+  });
+
+  it('is nothing to an older shell, or in a browser', () => {
+    (window as unknown as { bulwarkDesktop: unknown }).bulwarkDesktop = { version: 1, platform: 'win32', windows: {} };
+    expect(() => render(<Named view="Inbox" />)).not.toThrow();
+  });
+});
diff --git a/lib/desktop/languages.ts b/lib/desktop/languages.ts
index d531362e0..010b284fa 100644
--- a/lib/desktop/languages.ts
+++ b/lib/desktop/languages.ts
@@ -152,6 +152,7 @@ export function shellLabels(t: (key: string, values?: Record<string, string>) =>
     trayNewMessage: t('email_composer.new_message'),
     trayLockNow: t('appLock.lock_now'),
     menuLockNow: t('appLock.lock_now'),
+    menuUnlock: t('appLock.unlock'),
     trayUnread: t('email_list.sections.unread'),
     trayPause: t('desktopMenuBar.tray_pause'),
     trayPauseHour: t('desktopMenuBar.tray_pause_hour'),
diff --git a/lib/desktop/menu-bar.ts b/lib/desktop/menu-bar.ts
index 5ac75b267..effc2633f 100644
--- a/lib/desktop/menu-bar.ts
+++ b/lib/desktop/menu-bar.ts
@@ -8,6 +8,7 @@
 import { useEffect, useState } from 'react';
 import { getDesktopBridge } from './bridge';
 import { describeAccelerator } from './shortcut-keys';
+import { localKeyName } from '@/lib/shortcut-keys';
 
 import { MENU_BAR_STORAGE_KEY } from './boot';
 
@@ -66,14 +67,17 @@ const KEY_NAMES: Record<string, string> = {
   space: 'Space',
 };
 
-/** An Electron accelerator the way a Windows or Linux menu shows it: `Ctrl+Shift+N`, `Alt+←`, `?`. */
-export function menuKeyText(accelerator: string, platform: string | undefined): string {
+/**
+ * An Electron accelerator the way a Windows or Linux menu shows it: `Ctrl+Shift+N`, `Alt+←`, `?`,
+ * in the app's language (`Strg+Umschalt+N`, `Entf` in German). `language` defaults to the app's.
+ */
+export function menuKeyText(accelerator: string, platform: string | undefined, language?: string): string {
   // A key that is itself "+", as in Ctrl++, ends in an empty part.
   const parts = accelerator.split('+');
   const last = parts[parts.length - 1] === '' ? '+' : parts[parts.length - 1];
-  const key = KEY_NAMES[last.toLowerCase()] ?? (last.length === 1 ? last.toUpperCase() : last);
+  const key = localKeyName(KEY_NAMES[last.toLowerCase()] ?? (last.length === 1 ? last.toUpperCase() : last), language);
   const modifiers = parts.slice(0, parts[parts.length - 1] === '' ? -2 : -1);
   if (modifiers.length === 0) return key;
-  const named = describeAccelerator(`${modifiers.join('+')}+X`, platform);
+  const named = describeAccelerator(`${modifiers.join('+')}+X`, platform, language);
   return `${named.slice(0, -1)}${key}`;
 }
diff --git a/lib/desktop/os-commands.ts b/lib/desktop/os-commands.ts
index 9df939646..3a8628fba 100644
--- a/lib/desktop/os-commands.ts
+++ b/lib/desktop/os-commands.ts
@@ -133,10 +133,13 @@ function handleFiles(command: Extract<DesktopOsCommand, { type: 'files' }>, env:
   const made = command.files.map(({ name, data }) => new File([new Uint8Array(data)], name));
   const failed = [...command.failed];
   if (command.reason === 'attach' && command.ask) {
-    // Opened with the app ("Open with"): the same choice as dropping it on the window.
+    // An older shell's "Open with": the same choice as dropping it on the window.
     requestFileChoice({ files: made, preferred: 'new-message' });
   } else if (command.reason === 'attach') {
-    if (made.length > 0) handOffDraft({ files: made });
+    // Send to and Open with: a compose window with the files, as a mail link gets, and the
+    // main window stays where it is. Signed out, the sign-in has to show.
+    if (!useAuthStore.getState().isAuthenticated) showWindow();
+    if (made.length > 0) handOffDraft({ files: made, fromOs: true });
   } else {
     for (const file of made) {
       const kind = kindForFile(file);
diff --git a/lib/desktop/os-summary.ts b/lib/desktop/os-summary.ts
index 9476a1d84..1f351ec84 100644
--- a/lib/desktop/os-summary.ts
+++ b/lib/desktop/os-summary.ts
@@ -16,6 +16,7 @@ import { useAuthStore } from '@/stores/auth-store';
 import { useCalendarStore } from '@/stores/calendar-store';
 import { useEmailStore } from '@/stores/email-store';
 import { usePolicyStore } from '@/stores/policy-store';
+import { useSettingsStore, type TimeFormat } from '@/stores/settings-store';
 
 const ROWS = 5;
 const REFRESH_DELAY_MS = 2000;
@@ -36,12 +37,14 @@ export function nextEventOf(events: readonly CalendarEvent[], now: number): Cale
   return ahead[0] ?? null;
 }
 
-export function formatEventTime(start: number, now: number, locale: string | undefined): string {
+/** In the app's own time format (Settings > General), not the language's: 11:00, never 11:00 AM where the app shows 24 hours. */
+export function formatEventTime(start: number, now: number, locale: string | undefined, timeFormat: TimeFormat = '24h'): string {
   const date = new Date(start);
   const sameDay = date.toDateString() === new Date(now).toDateString();
+  const hour12 = timeFormat === '12h';
   const options: Intl.DateTimeFormatOptions = sameDay
-    ? { hour: 'numeric', minute: '2-digit' }
-    : { weekday: 'short', hour: 'numeric', minute: '2-digit' };
+    ? { hour: hour12 ? 'numeric' : '2-digit', minute: '2-digit', hour12 }
+    : { weekday: 'short', hour: hour12 ? 'numeric' : '2-digit', minute: '2-digit', hour12 };
   return new Intl.DateTimeFormat(locale, options).format(date);
 }
 
@@ -79,7 +82,7 @@ export async function readSummary(locale: string | undefined, now = Date.now()):
       before: new Date(now + EVENT_WINDOW_MS).toISOString(),
     }).catch(() => [] as CalendarEvent[]);
     const next = nextEventOf(events, now);
-    if (next) nextEvent = { title: next.title ?? '', when: formatEventTime(eventStart(next), now, locale) };
+    if (next) nextEvent = { title: next.title ?? '', when: formatEventTime(eventStart(next), now, locale, useSettingsStore.getState().timeFormat) };
   }
   // The tray lists one account's inbox: with more than one, it says whose.
   const several = useAccountStore.getState().accounts.length > 1;
diff --git a/lib/desktop/shortcut-keys.ts b/lib/desktop/shortcut-keys.ts
index 323fa048d..2b7ddba54 100644
--- a/lib/desktop/shortcut-keys.ts
+++ b/lib/desktop/shortcut-keys.ts
@@ -4,12 +4,23 @@
  * so the settings page can say why before the shell silently refuses.
  */
 
+import { localKeyName } from '@/lib/shortcut-keys';
+
 /**
  * What turning quick compose on gives when the shell doesn't say. On Windows the shell
  * answers Ctrl+Alt+Enter: Ctrl+Alt+N is AltGr+N, which types a character on many layouts.
  */
 export const QUICK_COMPOSE_DEFAULT = 'CommandOrControl+Alt+N';
 
+/**
+ * What "Show the app with a keyboard shortcut" takes when switched on: Ctrl+Alt+B (⌥⌘B), and
+ * on Windows Ctrl+Alt+F11, since Ctrl+Alt is AltGr there and B types on many layouts. The
+ * shell's showShortcutBuiltIn, which also moves anyone still on the old Ctrl+Shift+B to it.
+ */
+export function showShortcutDefault(platform: string | undefined): string {
+  return platform === 'win32' ? 'CommandOrControl+Alt+F11' : 'CommandOrControl+Alt+B';
+}
+
 const MAC_SYMBOLS: Record<string, string> = {
   control: '⌃',
   ctrl: '⌃',
@@ -41,7 +52,8 @@ const OTHER_NAMES: Record<string, string> = {
 /** The order a Mac shows modifiers in. */
 const MAC_ORDER = ['⌃', '⌥', '⇧', '⌘'];
 
-export function describeAccelerator(accelerator: string, platform: string | undefined): string {
+/** An Electron accelerator as people read it: ⇧⌘B on a Mac, Ctrl+Alt+F11 elsewhere, in the app's language (Strg in German). */
+export function describeAccelerator(accelerator: string, platform: string | undefined, language?: string): string {
   const parts = accelerator.split('+');
   const key = parts.pop() ?? '';
   const named = parts.map((part) => part.toLowerCase());
@@ -50,7 +62,7 @@ export function describeAccelerator(accelerator: string, platform: string | unde
     return [...symbols].sort((a, b) => MAC_ORDER.indexOf(a) - MAC_ORDER.indexOf(b)).join('') + key;
   }
   const superKey = platform === 'win32' ? 'Win' : 'Super';
-  return [...named.map((part) => OTHER_NAMES[part] ?? superKey), key].join('+');
+  return [...named.map((part) => OTHER_NAMES[part] ?? superKey), key].map((part) => localKeyName(part, language)).join('+');
 }
 
 export interface ShortcutKeyEvent {
@@ -67,6 +79,12 @@ export interface ShortcutKeyEvent {
  * shell's. `cmd` is Cmd on a Mac and Ctrl elsewhere.
  */
 const RESERVED = new Set(['cmd+shift+A', 'cmd+shift+C', 'cmd+shift+V', 'cmd+shift+X', 'cmd+shift+Z']);
+/**
+ * The app's own keys with two modifiers, which a global key would take from Bulwark itself:
+ * the composer's Cc, Bcc and schedule send, and the menus' new message, new window, Save as
+ * PDF, reply all and forward. Same list as APP_KEYS in the shell's os-rules.ts.
+ */
+const APP_KEYS = new Set(['cmd+shift+B', 'cmd+shift+C', 'cmd+shift+ENTER', 'cmd+shift+M', 'cmd+shift+N', 'cmd+shift+S', 'cmd+shift+R', 'cmd+shift+F']);
 const RESERVED_ON_MAC = new Set([
   'cmd+shift+3', 'cmd+shift+4', 'cmd+shift+5', 'cmd+shift+Q',
   'cmd+ctrl+Q', 'cmd+ctrl+F',
@@ -119,7 +137,7 @@ export function shortcutProblem(accelerator: string, platform: string | undefine
   if (modifiers.has('super')) return 'reserved';
   if (modifiers.size < 2 || !(modifiers.has('cmd') || modifiers.has('ctrl'))) return 'incomplete';
   const named = `${[...modifiers].sort().join('+')}+${key}`;
-  return RESERVED.has(named) || (mac && RESERVED_ON_MAC.has(named)) ? 'reserved' : null;
+  return RESERVED.has(named) || APP_KEYS.has(`${[...modifiers].sort().join('+')}+${key.toUpperCase()}`) || (mac && RESERVED_ON_MAC.has(named)) ? 'reserved' : null;
 }
 
 /**
diff --git a/lib/desktop/types.ts b/lib/desktop/types.ts
index 23044b5de..467f918d1 100644
--- a/lib/desktop/types.ts
+++ b/lib/desktop/types.ts
@@ -17,6 +17,8 @@ export interface DesktopWindowInfo {
   id: number;
   type: DesktopWindowType;
   title: string;
+  /** What the page calls the window in the Window menu (`setMenuName`), if it said. */
+  menuName?: string;
   focused: boolean;
   /** False for a main window hidden while pop-outs are open. */
   visible?: boolean;
@@ -46,6 +48,8 @@ export interface DesktopWindowsBridge {
   /** What this window's open drafts come back as at the next start: pop-out composer addresses. */
   setRestore?: (urls: string[]) => void;
   setRestoreEnabled?: (enabled: boolean) => void;
+  /** This window's name in the Window menu: lib/desktop/window-name.ts. */
+  setMenuName?: (name: string) => void;
   /** Signed in, with a session to lend: windows from last time can open. */
   sessionReady?: () => void;
   /** Nobody is signed in any more: a pop-out would find no session. */
diff --git a/lib/desktop/window-name.ts b/lib/desktop/window-name.ts
new file mode 100644
index 000000000..413421f90
--- /dev/null
+++ b/lib/desktop/window-name.ts
@@ -0,0 +1,26 @@
+"use client";
+
+import { useEffect } from 'react';
+import { getDesktopBridge } from './bridge';
+import { useAccountStore } from '@/stores/account-store';
+
+/**
+ * What the desktop app's Window menu calls this window (the shell numbers two alike and
+ * cuts long ones). The main window goes by its view and account ("Inbox - a@example.org"),
+ * not by the message open in it, so it never reads like a message window; a message window
+ * by its subject; a composer by its subject or "New message". Nothing in a browser.
+ */
+export function windowMenuName(view: string | null | undefined, account: string | null | undefined): string | null {
+  const parts = [view?.trim(), account?.trim()].filter(Boolean);
+  return parts.length ? parts.join(' - ') : null;
+}
+
+/** Tells the shell this window's Window menu name. `withAccount` adds the account in view, for the main window. */
+export function useDesktopWindowName(view: string | null | undefined, { withAccount = false }: { withAccount?: boolean } = {}): void {
+  const account = useAccountStore((s) => (withAccount ? s.accounts.find((a) => a.id === s.activeAccountId)?.email ?? null : null));
+  const name = windowMenuName(view, account);
+  useEffect(() => {
+    if (!name) return;
+    getDesktopBridge()?.windows?.setMenuName?.(name);
+  }, [name]);
+}
diff --git a/lib/keyboard-shortcuts/mail.ts b/lib/keyboard-shortcuts/mail.ts
index c5a950309..f9cdf761f 100644
--- a/lib/keyboard-shortcuts/mail.ts
+++ b/lib/keyboard-shortcuts/mail.ts
@@ -13,7 +13,8 @@ export const MAIL_SHORTCUTS = {
   actions: [
     { key: "r", description: "shortcuts.actions.reply", desktopKey: "Mod + R" },
     { key: "R / a", description: "shortcuts.actions.reply_all", desktopKey: "Mod + Shift + R" },
-    { key: "f", description: "shortcuts.actions.forward", desktopKey: "Mod + Shift + F" },
+    // Ctrl+F forwards with a message selected (Outlook) and searches elsewhere; Ctrl+Shift+F still works.
+    { key: "f", description: "shortcuts.actions.forward", desktopKey: "Mod + Shift + F", desktopPcKey: "Ctrl + F / Ctrl + Shift + F" },
     { key: "s", description: "shortcuts.actions.star" },
     { key: "e", description: "shortcuts.actions.archive", feature: "archiveActionEnabled" },
     { key: "# / Del", description: "shortcuts.actions.delete" },
diff --git a/lib/launch-handoff.ts b/lib/launch-handoff.ts
index 8f5be39ec..3e49de11d 100644
--- a/lib/launch-handoff.ts
+++ b/lib/launch-handoff.ts
@@ -42,6 +42,8 @@ export interface Handoff {
   /** New draft only. */
   subject?: string;
   body?: string;
+  /** From another program through the desktop app (Send to, Open with): a compose window of its own. */
+  fromOs?: boolean;
   createdAt: number;
 }
 
@@ -307,13 +309,14 @@ export function handOffFiles(files: File[], kind: HandoffKind): void {
 }
 
 /** Opens a new draft with this text and these files. Trusted: what came from outside was asked about first. */
-export function handOffDraft(draft: { subject?: string; body?: string; files?: File[] }): void {
+export function handOffDraft(draft: { subject?: string; body?: string; files?: File[]; fromOs?: boolean }): void {
   const subject = cleanMailtoSubject(draft.subject ?? '');
   const body = cleanMailtoBody(draft.body ?? '');
   enqueue({
     id: newId(),
     kind: 'compose',
     files: draft.files ?? [],
+    ...(draft.fromOs ? { fromOs: true } : {}),
     ...(subject ? { subject } : {}),
     ...(body ? { body } : {}),
     createdAt: Date.now(),
diff --git a/lib/popout/compose-handoff.ts b/lib/popout/compose-handoff.ts
index ec0fdf85b..0a4b17335 100644
--- a/lib/popout/compose-handoff.ts
+++ b/lib/popout/compose-handoff.ts
@@ -109,7 +109,9 @@ export function createComposeHandoff(): ComposeHandoff | null {
 /** Keeps the draft with this window, so a reload starts from it. */
 export function rememberComposePayload(handoffId: string, payload: ComposePopoutPayload): void {
   try {
-    sessionStorage.setItem(STORAGE_PREFIX + handoffId, JSON.stringify(payload));
+    // A File doesn't go into JSON: once attached, the draft holds it.
+    const { initialFiles: _files, ...kept } = payload;
+    sessionStorage.setItem(STORAGE_PREFIX + handoffId, JSON.stringify(kept));
   } catch {
     // Full or unavailable: a reload then starts from the saved draft's first state.
   }
diff --git a/lib/popout/compose-payload.ts b/lib/popout/compose-payload.ts
index 714bfc1ea..25057c441 100644
--- a/lib/popout/compose-payload.ts
+++ b/lib/popout/compose-payload.ts
@@ -20,4 +20,9 @@ export interface ComposePopoutPayload {
   sourceEmailSource?: EmailWriteSource | null;
   /** The mailbox a new message was started from; picks the identity (see the composer's prop). */
   composeFromAccountEmail?: string;
+  /**
+   * Files to attach as it opens: Send to and Open with in the desktop app. They cross to the
+   * window as they are (BroadcastChannel clones a File) and aren't kept for a reload.
+   */
+  initialFiles?: File[];
 }
diff --git a/lib/protocol-handlers/session.ts b/lib/protocol-handlers/session.ts
index ba9d39365..0392420b7 100644
--- a/lib/protocol-handlers/session.ts
+++ b/lib/protocol-handlers/session.ts
@@ -357,3 +357,14 @@ export function subscribeToPendingWebcal(callback: () => void): () => void {
 export function hasPendingWebcal(): boolean {
   return hasPending(WEBCAL_KEY, isParsedWebcal);
 }
+
+/**
+ * The account a mail link from outside goes out from, with no question: the one marked
+ * default, else the one in use, as Outlook and Thunderbird do. The composer's From can
+ * change it. Only signed-in accounts count.
+ */
+export function mailLinkAccountId(accounts: readonly { id: string }[], defaultId: string | null, activeId: string | null): string | null {
+  if (defaultId && accounts.some((account) => account.id === defaultId)) return defaultId;
+  if (activeId && accounts.some((account) => account.id === activeId)) return activeId;
+  return accounts[0]?.id ?? activeId ?? null;
+}
diff --git a/lib/shortcut-keys.ts b/lib/shortcut-keys.ts
index 498365b86..c97f87ccd 100644
--- a/lib/shortcut-keys.ts
+++ b/lib/shortcut-keys.ts
@@ -12,23 +12,53 @@ export function isApplePlatform(): boolean {
 
 const MOD = /^(mod|ctrl\/⌘|ctrl\/cmd|cmd\/ctrl|⌘\/ctrl)$/i;
 
-/** One key or combination ("Mod + Enter") in the notation of this platform. */
-export function formatShortcutCombo(combo: string, apple = isApplePlatform()): string {
+/**
+ * Key names as Windows writes them in each language, on its keyboards and in every app's
+ * menus: German "Strg+Umschalt+R", "Entf". Languages not here keep the English names, as
+ * Windows does for them. macOS has symbols, which need no words.
+ */
+const KEY_NAMES: Record<string, Record<string, string>> = {
+  de: { Ctrl: 'Strg', Shift: 'Umschalt', Del: 'Entf', Delete: 'Entf', Enter: 'Eingabe', Backspace: 'Rücktaste', Home: 'Pos1', End: 'Ende', PageUp: 'Bild↑', PageDown: 'Bild↓', Insert: 'Einfg', Space: 'Leertaste' },
+  fr: { Shift: 'Maj', Del: 'Suppr', Delete: 'Suppr', Enter: 'Entrée', Backspace: 'Retour arrière', Home: 'Origine', End: 'Fin', PageUp: 'Pg.Préc', PageDown: 'Pg.Suiv', Insert: 'Inser', Space: 'Espace' },
+  es: { Shift: 'Mayús', Del: 'Supr', Delete: 'Supr', Enter: 'Entrar', Backspace: 'Retroceso', Home: 'Inicio', End: 'Fin', PageUp: 'Re Pág', PageDown: 'Av Pág', Space: 'Espacio' },
+  it: { Shift: 'Maiusc', Del: 'Canc', Delete: 'Canc', Enter: 'Invio', Space: 'Spazio' },
+};
+
+/** The app's language, from <html lang> (components/providers/intl-provider.tsx keeps it). */
+function pageLanguage(): string {
+  if (typeof document === 'undefined') return 'en';
+  return (document.documentElement.lang || 'en').toLowerCase().split('-')[0];
+}
+
+/**
+ * One key's name in a language: "Ctrl" is "Strg" in German. Takes the English names this
+ * notation and Electron use ("Ctrl", "Shift", "Del", "Delete", "Enter", "PageUp"); anything
+ * else comes back as it is. `language` defaults to the app's.
+ */
+export function localKeyName(name: string, language: string = pageLanguage()): string {
+  const table = KEY_NAMES[language.toLowerCase().split('-')[0]];
+  if (!table) return name;
+  const canonical = Object.keys(table).find((key) => key.toLowerCase() === name.toLowerCase());
+  return canonical ? table[canonical] : name;
+}
+
+/** One key or combination ("Mod + Enter") in the notation of this platform and the app's language. */
+export function formatShortcutCombo(combo: string, apple = isApplePlatform(), language: string = pageLanguage()): string {
   // Keeps the spacing it was written with ("Ctrl+Shift+Y" from a plugin).
   const separator = /\s\+\s/.test(combo) ? " + " : "+";
   return combo
     .split(/\s*\+\s*/)
     .map((part) => {
-      if (MOD.test(part)) return apple ? '⌘' : 'Ctrl';
-      if (/^ctrl$/i.test(part)) return apple ? '⌘' : 'Ctrl';
-      if (/^(cmd|⌘)$/i.test(part)) return apple ? '⌘' : 'Ctrl';
+      if (MOD.test(part)) return apple ? '⌘' : localKeyName('Ctrl', language);
+      if (/^ctrl$/i.test(part)) return apple ? '⌘' : localKeyName('Ctrl', language);
+      if (/^(cmd|⌘)$/i.test(part)) return apple ? '⌘' : localKeyName('Ctrl', language);
       if (/^alt$/i.test(part)) return apple ? '⌥' : 'Alt';
-      return part;
+      return apple ? part : localKeyName(part, language);
     })
     .join(separator);
 }
 
-/** The alternatives of a shortcut ("j / ↓"), each in the notation of this platform. */
-export function shortcutAlternatives(key: string, apple = isApplePlatform()): string[] {
-  return key.split(' / ').map((combo) => formatShortcutCombo(combo, apple));
+/** The alternatives of a shortcut ("j / ↓"), each in the notation of this platform and the app's language. */
+export function shortcutAlternatives(key: string, apple = isApplePlatform(), language: string = pageLanguage()): string[] {
+  return key.split(' / ').map((combo) => formatShortcutCombo(combo, apple, language));
 }
diff --git a/lib/window-controls-overlay.ts b/lib/window-controls-overlay.ts
index d679f023f..100434fba 100644
--- a/lib/window-controls-overlay.ts
+++ b/lib/window-controls-overlay.ts
@@ -94,9 +94,14 @@ export function applyControlsArea(area: TitlebarArea | null, root: HTMLElement =
 
 /**
  * Calls `listener` now and whenever the overlay's size or visibility changes
- * (`geometrychange`). Without the API it calls it once with null and listens
- * to nothing, so a browser without it runs no extra code. Returns the
- * unsubscribe.
+ * (`geometrychange`), and again when the page's width does (`resize`).
+ * Without the API it calls it once with null and listens to nothing, so a
+ * browser without it runs no extra code. Returns the unsubscribe.
+ *
+ * `geometrychange` comes before the page has its new width: after a maximise,
+ * restore, snap or drag the rect is the new one and innerWidth still the old,
+ * so the room worked out from the two is wrong (none at all after growing, more
+ * than the window after shrinking). The `resize` that follows has both.
  */
 export function watchTitlebarArea(listener: (area: TitlebarArea | null) => void): () => void {
   listener(readTitlebarArea());
@@ -104,7 +109,11 @@ export function watchTitlebarArea(listener: (area: TitlebarArea | null) => void)
   if (!current) return () => {};
   const onChange = () => listener(readTitlebarArea());
   current.addEventListener('geometrychange', onChange);
-  return () => current.removeEventListener('geometrychange', onChange);
+  window.addEventListener('resize', onChange);
+  return () => {
+    current.removeEventListener('geometrychange', onChange);
+    window.removeEventListener('resize', onChange);
+  };
 }
 
 const ROW_CANDIDATES = '[data-window-top-row], [data-composer-header], header, div.h-14, div.min-h-14, div.h-12, div.h-16, div.min-h-16';
diff --git a/locales/ar/common.json b/locales/ar/common.json
index 7d9cfdd94..f256e1e26 100644
--- a/locales/ar/common.json
+++ b/locales/ar/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "اختر الحساب",
     "select_mailto_account": "اختر الحساب الذي سيفتح رابط البريد هذا.",
     "select_webcal_account": "اختر الحساب الذي سيفتح رابط التقويم هذا.",
-    "select_account_note": "ينطبق هذا فقط على رابط البروتوكول هذا.",
     "detail_to": "إلى",
     "detail_subject": "الموضوع",
     "detail_no_subject": "بلا موضوع",
@@ -1069,7 +1068,7 @@
     "recipients_partly_refused": "رفض الخادم {recipients}. سيتلقى باقي المستلمين الرسالة.",
     "send_offline": "يبدو أنك غير متصل. الرسالة ما زالت هنا، أرسلها مجددًا عند عودة الاتصال.",
     "formatting": "التنسيق",
-    "send_recipients_rejected": "لم تُرسل الرسالة - رفض الخادم جميع المستلمين.",
+    "send_recipients_rejected": "لم تُرسل الرسالة: رفض الخادم جميع المستلمين.",
     "send_plugin_failed": "لم يُرسل - فشلت إضافة تتولى الإرسال أو استغرقت وقتًا طويلًا. تحقق من مجلد المرسل قبل الإرسال مرة أخرى.",
     "send_some_recipients_rejected": "أُرسلت الرسالة، لكن ليس إلى هؤلاء المستلمين - رفضهم الخادم.",
     "continue_draft": "متابعة المسودة",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "شغّل تقارير الأعطال أولًا.",
     "send_no_url": "لم يُحدَّد عنوان، لذا لا توجد وجهة للإرسال. أدخل عنوانًا في الأعلى.",
     "send_failed": "تعذّر إرسال تقرير العطل."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "عدد الرسائل غير المقروءة على أيقونة شريط المهام",
+    "unread_badge_description": "لترى البريد الجديد أثناء عملك في تطبيق آخر.",
+    "tip_compose_keys": "اضغط {keys} لكتابة رسالة جديدة",
+    "tip_palette_keys": "اضغط {keys} للعثور على أي أمر"
   }
 }
diff --git a/locales/ca/common.json b/locales/ca/common.json
index aab82b078..77da50f6d 100644
--- a/locales/ca/common.json
+++ b/locales/ca/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Trieu un compte",
     "select_mailto_account": "Trieu quin compte ha d'obrir aquest enllaç de correu.",
     "select_webcal_account": "Trieu quin compte ha d'obrir aquest enllaç de calendari.",
-    "select_account_note": "Això només s'aplica a aquest enllaç de protocol.",
     "detail_to": "Per a",
     "detail_subject": "Assumpte",
     "detail_no_subject": "Sense assumpte",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Activa primer els informes d'errors greus.",
     "send_no_url": "No hi ha cap adreça, així que no hi ha on enviar-ho. Escriu-ne una a dalt.",
     "send_failed": "No s'ha pogut enviar l'informe d'error."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Nombre de no llegits a la icona de la barra de tasques",
+    "unread_badge_description": "Per veure el correu nou mentre treballeu en una altra aplicació.",
+    "tip_compose_keys": "Premeu {keys} per escriure un missatge nou",
+    "tip_palette_keys": "Premeu {keys} per trobar qualsevol ordre"
   }
 }
diff --git a/locales/cs/common.json b/locales/cs/common.json
index 5ec9de28a..096fc06d7 100644
--- a/locales/cs/common.json
+++ b/locales/cs/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Vybrat účet",
     "select_mailto_account": "Vyberte účet, ve kterém se má tento e-mailový odkaz otevřít.",
     "select_webcal_account": "Vyberte účet, ve kterém se má tento kalendářový odkaz otevřít.",
-    "select_account_note": "Tato volba platí jen pro tento odkaz protokolu.",
     "detail_to": "Komu",
     "detail_subject": "Předmět",
     "detail_no_subject": "Bez předmětu",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Nejprve zapněte hlášení o pádech.",
     "send_no_url": "Není nastavena žádná adresa, takže to nejde kam odeslat. Zadejte ji výše.",
     "send_failed": "Hlášení o pádu se nepodařilo odeslat."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Počet nepřečtených na ikoně na hlavním panelu",
+    "unread_badge_description": "Abyste viděli novou poštu, i když pracujete v jiné aplikaci.",
+    "tip_compose_keys": "Stiskněte {keys} a napište novou zprávu",
+    "tip_palette_keys": "Stiskněte {keys} a najděte jakýkoli příkaz"
   }
 }
diff --git a/locales/da/common.json b/locales/da/common.json
index dd90d4f3c..362701bff 100644
--- a/locales/da/common.json
+++ b/locales/da/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Vælg konto",
     "select_mailto_account": "Vælg hvilken konto der skal åbne dette e-mail-link.",
     "select_webcal_account": "Vælg hvilken konto der skal åbne dette kalenderlink.",
-    "select_account_note": "Dette gælder kun for dette protokollink.",
     "detail_to": "Til",
     "detail_subject": "Emne",
     "detail_no_subject": "Intet emne",
@@ -1068,7 +1067,7 @@
     "recipients_partly_refused": "Serveren afviste {recipients}. De øvrige modtagere får beskeden.",
     "send_offline": "Du ser ud til at være offline. Beskeden er her stadig, send den igen, når du er online.",
     "formatting": "Formatering",
-    "send_recipients_rejected": "Ikke sendt - serveren afviste alle modtagere.",
+    "send_recipients_rejected": "Ikke sendt: serveren afviste alle modtagere.",
     "send_plugin_failed": "Ikke sendt - et plugin, der står for afsendelsen, fejlede eller tog for lang tid. Tjek mappen Sendt, før du sender igen.",
     "send_some_recipients_rejected": "Sendt, men ikke til disse modtagere - serveren afviste dem.",
     "continue_draft": "Fortsæt kladde",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Slå først nedbrudsrapporter til.",
     "send_no_url": "Der er ikke angivet en adresse, så den kan ikke sendes nogen steder. Skriv en ovenfor.",
     "send_failed": "Nedbrudsrapporten kunne ikke sendes."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Antal ulæste på ikonet på proceslinjen",
+    "unread_badge_description": "Så du ser ny mail, mens du arbejder i en anden app.",
+    "tip_compose_keys": "Tryk på {keys} for at skrive en ny besked",
+    "tip_palette_keys": "Tryk på {keys} for at finde en kommando"
   }
 }
diff --git a/locales/de/common.json b/locales/de/common.json
index 77cca24f0..82a20557d 100644
--- a/locales/de/common.json
+++ b/locales/de/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Account auswählen",
     "select_mailto_account": "Wählen Sie aus, mit welchem Account dieser E-Mail-Link geöffnet werden soll.",
     "select_webcal_account": "Wählen Sie aus, mit welchem Account dieser Kalender-Link geöffnet werden soll.",
-    "select_account_note": "Diese Auswahl gilt nur für diesen Protokoll-Link.",
     "detail_to": "An",
     "detail_subject": "Betreff",
     "detail_no_subject": "Ohne Betreff",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Schalten Sie zuerst die Absturzberichte ein.",
     "send_no_url": "Es ist keine Adresse eingetragen, daher gibt es kein Ziel. Geben Sie oben eine ein.",
     "send_failed": "Der Absturzbericht konnte nicht gesendet werden."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Anzahl ungelesener Nachrichten am Taskleistensymbol",
+    "unread_badge_description": "So sehen Sie neue Mail, während Sie in einer anderen App arbeiten.",
+    "tip_compose_keys": "Drücken Sie {keys}, um eine neue Nachricht zu schreiben",
+    "tip_palette_keys": "Drücken Sie {keys}, um jeden Befehl zu finden"
   }
 }
diff --git a/locales/en/common.json b/locales/en/common.json
index bf3f7665e..fdacbd37a 100644
--- a/locales/en/common.json
+++ b/locales/en/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Choose account",
     "select_mailto_account": "Choose which account should open this email link.",
     "select_webcal_account": "Choose which account should open this calendar link.",
-    "select_account_note": "This only applies to this protocol link.",
     "detail_to": "To",
     "detail_subject": "Subject",
     "detail_no_subject": "No subject",
@@ -1069,7 +1068,7 @@
     "submission_limit": "The server refused to send the message because a limit was reached: {reason}",
     "recipients_refused": "Not sent: the server refused {recipients}.",
     "recipients_partly_refused": "The server refused {recipients}. The other recipients get the message.",
-    "send_recipients_rejected": "Not sent - the server rejected every recipient.",
+    "send_recipients_rejected": "Not sent: the server rejected every recipient.",
     "cut": "Cut",
     "copy": "Copy",
     "send_plugin_failed": "Not sent - a plugin that handles sending failed or took too long. Check your Sent folder before sending again.",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Turn on crash reports first.",
     "send_no_url": "No address is set, so there's nowhere to send this. Enter one above.",
     "send_failed": "The crash report couldn't be sent."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Unread count on the taskbar icon",
+    "unread_badge_description": "So you see new mail while you work in another app.",
+    "tip_compose_keys": "Press {keys} to write a new message",
+    "tip_palette_keys": "Press {keys} to find any command"
   }
 }
diff --git a/locales/es/common.json b/locales/es/common.json
index 4fd51a0a4..ca3d0dbee 100644
--- a/locales/es/common.json
+++ b/locales/es/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Elegir cuenta",
     "select_mailto_account": "Elige qué cuenta debe abrir este enlace de correo.",
     "select_webcal_account": "Elige qué cuenta debe abrir este enlace de calendario.",
-    "select_account_note": "Esta selección solo se aplica a este enlace de protocolo.",
     "detail_to": "Para",
     "detail_subject": "Asunto",
     "detail_no_subject": "Sin asunto",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Activa primero los informes de fallos.",
     "send_no_url": "No hay ninguna dirección, así que no hay adónde enviarlo. Escribe una arriba.",
     "send_failed": "No se ha podido enviar el informe de fallo."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Número de no leídos en el icono de la barra de tareas",
+    "unread_badge_description": "Para ver el correo nuevo mientras trabaja en otra aplicación.",
+    "tip_compose_keys": "Pulse {keys} para escribir un mensaje nuevo",
+    "tip_palette_keys": "Pulse {keys} para buscar cualquier comando"
   }
 }
diff --git a/locales/et/common.json b/locales/et/common.json
index fdd7047aa..e4271a161 100644
--- a/locales/et/common.json
+++ b/locales/et/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Vali konto",
     "select_mailto_account": "Vali, milline konto peaks selle e-posti lingi avama.",
     "select_webcal_account": "Vali, milline konto peaks selle kalendrilingi avama.",
-    "select_account_note": "See kehtib ainult selle protokollilingi kohta.",
     "detail_to": "Kellele",
     "detail_subject": "Teema",
     "detail_no_subject": "Teema puudub",
@@ -1069,7 +1068,7 @@
     "submission_limit": "Server keeldus kirja saatmast, sest piirang on täis: {reason}",
     "recipients_refused": "Ei saadetud: server lükkas tagasi {recipients}.",
     "recipients_partly_refused": "Server lükkas tagasi {recipients}. Teised adressaadid saavad kirja kätte.",
-    "send_recipients_rejected": "Ei saadetud - server lükkas kõik adressaadid tagasi.",
+    "send_recipients_rejected": "Ei saadetud: server lükkas kõik adressaadid tagasi.",
     "send_plugin_failed": "Ei saadetud - saatmist käsitlev pistikprogramm ebaõnnestus või võttis liiga kaua aega. Kontrolli enne uuesti saatmist kausta Saadetud.",
     "send_some_recipients_rejected": "Saadetud, kuid mitte neile adressaatidele - server lükkas nad tagasi.",
     "continue_draft": "Jätka mustandiga",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Lülitage esmalt kokkujooksmise aruanded sisse.",
     "send_no_url": "Aadressi pole määratud, seega pole seda kuhugi saata. Sisestage see ülal.",
     "send_failed": "Kokkujooksmise aruannet ei õnnestunud saata."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Lugemata kirjade arv tegumiriba ikoonil",
+    "unread_badge_description": "Nii näete uut kirja ka siis, kui töötate teises rakenduses.",
+    "tip_compose_keys": "Uue kirja kirjutamiseks vajutage {keys}",
+    "tip_palette_keys": "Mis tahes käsu leidmiseks vajutage {keys}"
   }
 }
diff --git a/locales/fa/common.json b/locales/fa/common.json
index 29c1ed661..b988e84ea 100644
--- a/locales/fa/common.json
+++ b/locales/fa/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "انتخاب حساب",
     "select_mailto_account": "انتخاب کنید کدام حساب این لینک ایمیل را باز کند.",
     "select_webcal_account": "انتخاب کنید کدام حساب این لینک تقویم را باز کند.",
-    "select_account_note": "فقط برای این لینک پروتکل اعمال می‌شود.",
     "detail_to": "به",
     "detail_subject": "موضوع",
     "detail_no_subject": "بدون موضوع",
@@ -1069,7 +1068,7 @@
     "recipients_partly_refused": "سرور {recipients} را رد کرد. سایر گیرندگان پیام را دریافت می‌کنند.",
     "send_offline": "به نظر می‌رسد آفلاین هستید. پیام هنوز اینجاست، وقتی آنلاین شدید دوباره ارسالش کنید.",
     "formatting": "قالب‌بندی",
-    "send_recipients_rejected": "ارسال نشد - سرور همه گیرندگان را رد کرد.",
+    "send_recipients_rejected": "ارسال نشد: سرور همه گیرندگان را رد کرد.",
     "send_plugin_failed": "ارسال نشد - افزونه‌ای که ارسال را انجام می‌دهد با خطا مواجه شد یا بیش از حد طول کشید. پیش از ارسال دوباره، پوشه ارسال‌شده را بررسی کنید.",
     "send_some_recipients_rejected": "ارسال شد، اما نه برای این گیرندگان - سرور آنها را رد کرد.",
     "continue_draft": "ادامه پیش‌نویس",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "ابتدا گزارش‌های خرابی را روشن کنید.",
     "send_no_url": "نشانی‌ای تنظیم نشده، پس جایی برای ارسال نیست. در بالا یکی وارد کنید.",
     "send_failed": "گزارش خرابی ارسال نشد."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "تعداد خوانده‌نشده‌ها روی نماد نوار وظیفه",
+    "unread_badge_description": "تا ایمیل جدید را هنگام کار در برنامه‌ای دیگر ببینید.",
+    "tip_compose_keys": "برای نوشتن پیام جدید {keys} را فشار دهید",
+    "tip_palette_keys": "برای یافتن هر فرمانی {keys} را فشار دهید"
   }
 }
diff --git a/locales/fr/common.json b/locales/fr/common.json
index ce27a3231..fb24a83b4 100644
--- a/locales/fr/common.json
+++ b/locales/fr/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Choisir un compte",
     "select_mailto_account": "Choisissez le compte qui doit ouvrir ce lien e-mail.",
     "select_webcal_account": "Choisissez le compte qui doit ouvrir ce lien de calendrier.",
-    "select_account_note": "Cette sélection s'applique uniquement à ce lien de protocole.",
     "detail_to": "À",
     "detail_subject": "Objet",
     "detail_no_subject": "Sans objet",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Activez d'abord les rapports de plantage.",
     "send_no_url": "Aucune adresse n'est définie, il n'y a donc nulle part où envoyer ce rapport. Saisissez-en une ci-dessus.",
     "send_failed": "Le rapport de plantage n'a pas pu être envoyé."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Nombre de non-lus sur l'icône de la barre des tâches",
+    "unread_badge_description": "Pour voir les nouveaux messages pendant que vous travaillez dans une autre application.",
+    "tip_compose_keys": "Appuyez sur {keys} pour écrire un nouveau message",
+    "tip_palette_keys": "Appuyez sur {keys} pour trouver n'importe quelle commande"
   }
 }
diff --git a/locales/he/common.json b/locales/he/common.json
index 9736ef786..31f84ee84 100644
--- a/locales/he/common.json
+++ b/locales/he/common.json
@@ -991,7 +991,7 @@
     "recipients_partly_refused": "השרת דחה את {recipients}. שאר הנמענים יקבלו את ההודעה.",
     "send_offline": "נראה שאין חיבור לרשת. ההודעה עדיין כאן, שלחו אותה שוב כשתחזרו לרשת.",
     "formatting": "עיצוב",
-    "send_recipients_rejected": "לא נשלח - השרת דחה את כל הנמענים.",
+    "send_recipients_rejected": "לא נשלח: השרת דחה את כל הנמענים.",
     "send_plugin_failed": "לא נשלח - תוסף שמטפל בשליחה נכשל או לקח יותר מדי זמן. בדקו את תיקיית דואר יוצא לפני שליחה חוזרת.",
     "send_some_recipients_rejected": "נשלח, אך לא לנמענים האלה - השרת דחה אותם.",
     "continue_draft": "המשך טיוטה",
@@ -5521,7 +5521,6 @@
     "select_account_title": "בחר חשבון",
     "select_mailto_account": "בחר איזה חשבון צריך לפתוח קישור דוא״ל זה.",
     "select_webcal_account": "בחר איזה חשבון צריך לפתוח קישור לוח שנה זה.",
-    "select_account_note": "זה חל רק על קישור פרוטוקול זה.",
     "detail_to": "אל",
     "detail_subject": "נושא",
     "detail_no_subject": "אין נושא",
@@ -7592,5 +7591,11 @@
     "send_no_consent": "הפעילו קודם את דוחות הקריסה.",
     "send_no_url": "לא הוגדרה כתובת, ולכן אין לאן לשלוח. הזינו כתובת למעלה.",
     "send_failed": "לא ניתן היה לשלוח את דוח הקריסה."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "מספר ההודעות שלא נקראו על הסמל בשורת המשימות",
+    "unread_badge_description": "כדי לראות דואר חדש בזמן שאתם עובדים באפליקציה אחרת.",
+    "tip_compose_keys": "הקישו {keys} כדי לכתוב הודעה חדשה",
+    "tip_palette_keys": "הקישו {keys} כדי למצוא כל פקודה"
   }
 }
diff --git a/locales/hu/common.json b/locales/hu/common.json
index 32af520d5..1ec1ffbd2 100644
--- a/locales/hu/common.json
+++ b/locales/hu/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Fiók kiválasztása",
     "select_mailto_account": "Válaszd ki, melyik fiók nyissa meg ezt az e-mail hivatkozást.",
     "select_webcal_account": "Válaszd ki, melyik fiók nyissa meg ezt a naptár hivatkozást.",
-    "select_account_note": "Ez csak erre a protokoll hivatkozásra vonatkozik.",
     "detail_to": "Címzett",
     "detail_subject": "Tárgy",
     "detail_no_subject": "Nincs tárgy",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Először kapcsolja be az összeomlási jelentéseket.",
     "send_no_url": "Nincs megadva cím, így nincs hová küldeni. Adjon meg egyet fent.",
     "send_failed": "Az összeomlási jelentést nem sikerült elküldeni."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Olvasatlan levelek száma a tálca ikonján",
+    "unread_badge_description": "Így akkor is látja az új leveleket, ha egy másik alkalmazásban dolgozik.",
+    "tip_compose_keys": "Új üzenet írásához nyomja meg: {keys}",
+    "tip_palette_keys": "Bármely parancs kereséséhez nyomja meg: {keys}"
   }
 }
diff --git a/locales/it/common.json b/locales/it/common.json
index 03cca539f..c49c320a6 100644
--- a/locales/it/common.json
+++ b/locales/it/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Scegli account",
     "select_mailto_account": "Scegli quale account deve aprire questo link e-mail.",
     "select_webcal_account": "Scegli quale account deve aprire questo link calendario.",
-    "select_account_note": "Questa scelta si applica solo a questo link di protocollo.",
     "detail_to": "A",
     "detail_subject": "Oggetto",
     "detail_no_subject": "Senza oggetto",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Attiva prima le segnalazioni di arresto anomalo.",
     "send_no_url": "Non è impostato alcun indirizzo, quindi non c'è dove inviarla. Inseriscine uno qui sopra.",
     "send_failed": "Impossibile inviare la segnalazione di arresto."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Numero di messaggi non letti sull'icona della barra delle applicazioni",
+    "unread_badge_description": "Per vedere la nuova posta mentre lavori in un'altra app.",
+    "tip_compose_keys": "Premi {keys} per scrivere un nuovo messaggio",
+    "tip_palette_keys": "Premi {keys} per trovare qualsiasi comando"
   }
 }
diff --git a/locales/ja/common.json b/locales/ja/common.json
index a227082fb..aa6bd1a99 100644
--- a/locales/ja/common.json
+++ b/locales/ja/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "アカウントを選択",
     "select_mailto_account": "このメールリンクを開くアカウントを選択してください。",
     "select_webcal_account": "このカレンダーリンクを開くアカウントを選択してください。",
-    "select_account_note": "この選択は、このプロトコル リンクにのみ適用されます。",
     "detail_to": "宛先",
     "detail_subject": "件名",
     "detail_no_subject": "件名なし",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "先にクラッシュレポートをオンにしてください。",
     "send_no_url": "アドレスが設定されていないため、送信先がありません。上で入力してください。",
     "send_failed": "クラッシュレポートを送信できませんでした。"
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "タスクバーのアイコンに未読数を表示",
+    "unread_badge_description": "別のアプリで作業中でも新着メールがわかります。",
+    "tip_compose_keys": "{keys} を押して新しいメッセージを作成",
+    "tip_palette_keys": "{keys} を押してコマンドを検索"
   }
 }
diff --git a/locales/ko/common.json b/locales/ko/common.json
index 1becb481e..5afe4d566 100644
--- a/locales/ko/common.json
+++ b/locales/ko/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "계정 선택",
     "select_mailto_account": "이 이메일 링크를 열 계정을 선택하세요.",
     "select_webcal_account": "이 캘린더 링크를 열 계정을 선택하세요.",
-    "select_account_note": "이 선택은 이 프로토콜 링크에만 적용됩니다.",
     "detail_to": "받는 사람",
     "detail_subject": "제목",
     "detail_no_subject": "제목 없음",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "먼저 충돌 보고서를 켜세요.",
     "send_no_url": "주소가 설정되지 않아 보낼 곳이 없습니다. 위에 입력하세요.",
     "send_failed": "충돌 보고서를 보낼 수 없습니다."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "작업 표시줄 아이콘에 읽지 않은 수 표시",
+    "unread_badge_description": "다른 앱에서 작업하는 동안에도 새 메일을 확인할 수 있습니다.",
+    "tip_compose_keys": "{keys}를 눌러 새 메시지 쓰기",
+    "tip_palette_keys": "{keys}를 눌러 명령 찾기"
   }
 }
diff --git a/locales/lv/common.json b/locales/lv/common.json
index 2873208d1..32cce2034 100644
--- a/locales/lv/common.json
+++ b/locales/lv/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Izvēlieties kontu",
     "select_mailto_account": "Izvēlieties, kurā kontā atvērt šo e-pasta saiti.",
     "select_webcal_account": "Izvēlieties, kurā kontā atvērt šo kalendāra saiti.",
-    "select_account_note": "Šī izvēle attiecas tikai uz šo protokola saiti.",
     "detail_to": "Kam",
     "detail_subject": "Temats",
     "detail_no_subject": "Bez temata",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Vispirms ieslēdziet avāriju atskaites.",
     "send_no_url": "Adrese nav iestatīta, tāpēc to nav kur sūtīt. Ievadiet to augstāk.",
     "send_failed": "Avārijas atskaiti neizdevās nosūtīt."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Nelasīto skaits uzdevumjoslas ikonā",
+    "unread_badge_description": "Lai redzētu jaunu pastu, kamēr strādājat citā lietotnē.",
+    "tip_compose_keys": "Nospiediet {keys}, lai rakstītu jaunu ziņojumu",
+    "tip_palette_keys": "Nospiediet {keys}, lai atrastu jebkuru komandu"
   }
 }
diff --git a/locales/mn/common.json b/locales/mn/common.json
index d78877b4f..f98596654 100644
--- a/locales/mn/common.json
+++ b/locales/mn/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Бүртгэл сонгох",
     "select_mailto_account": "Энэ имэйлийн холбоосыг аль бүртгэлээр нээхийг сонгоно уу.",
     "select_webcal_account": "Энэ хуанлийн холбоосыг аль данс нээхийг сонгоно уу.",
-    "select_account_note": "Энэ нь зөвхөн энэ протоколын холбоост хамаарна.",
     "detail_to": "Хэнд",
     "detail_subject": "Сэдэв",
     "detail_no_subject": "Сэдэв байхгүй",
@@ -1069,7 +1068,7 @@
     "recipients_partly_refused": "Сервер дараах хүлээн авагчдыг татгалзлаа: {recipients}. Бусад хүлээн авагчид мессежийг хүлээн авна.",
     "send_offline": "Та офлайн байх шиг байна. Мессеж энд хадгалагдсан тул онлайн болмогц дахин илгээнэ үү.",
     "formatting": "Формат",
-    "send_recipients_rejected": "Илгээгдсэнгүй - сервер бүх хүлээн авагчийг татгалзсан.",
+    "send_recipients_rejected": "Илгээгдсэнгүй: сервер бүх хүлээн авагчийг татгалзсан.",
     "send_plugin_failed": "Илгээгдсэнгүй - илгээлтийг гүйцэтгэдэг залгаас алдаа гаргасан эсвэл хэт удсан. Дахин илгээхээсээ өмнө Илгээсэн хавтсаа шалгана уу.",
     "send_some_recipients_rejected": "Илгээсэн, гэхдээ эдгээр хүлээн авагчид хүрэхгүй - сервер тэднийг татгалзсан.",
     "continue_draft": "Ноорог үргэлжлүүлэх",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Эхлээд гэмтлийн тайланг асаана уу.",
     "send_no_url": "Хаяг тохируулаагүй тул илгээх газаргүй. Дээр нэгийг оруулна уу.",
     "send_failed": "Гэмтлийн тайланг илгээж чадсангүй."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Ажлын самбарын дүрс дээрх уншаагүй тоо",
+    "unread_badge_description": "Өөр апп дээр ажиллаж байхдаа шинэ шуудангаа харахын тулд.",
+    "tip_compose_keys": "Шинэ зурвас бичихийн тулд {keys} дарна уу",
+    "tip_palette_keys": "Ямар ч тушаал олохын тулд {keys} дарна уу"
   }
 }
diff --git a/locales/nb/common.json b/locales/nb/common.json
index 12cf8cedd..2beb9225a 100644
--- a/locales/nb/common.json
+++ b/locales/nb/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Velg konto",
     "select_mailto_account": "Velg hvilken konto som skal åpne denne e-postlenken.",
     "select_webcal_account": "Velg hvilken konto som skal åpne denne kalenderlenken.",
-    "select_account_note": "Dette gjelder bare denne lenken.",
     "detail_to": "Til",
     "detail_subject": "Emne",
     "detail_no_subject": "Uten emne",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Slå på krasjrapporter først.",
     "send_no_url": "Ingen adresse er angitt, så den kan ikke sendes noe sted. Skriv inn en ovenfor.",
     "send_failed": "Krasjrapporten kunne ikke sendes."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Antall uleste på ikonet på oppgavelinjen",
+    "unread_badge_description": "Slik ser du ny e-post mens du jobber i en annen app.",
+    "tip_compose_keys": "Trykk på {keys} for å skrive en ny melding",
+    "tip_palette_keys": "Trykk på {keys} for å finne en kommando"
   }
 }
diff --git a/locales/nl/common.json b/locales/nl/common.json
index b7405bd9e..2001ca069 100644
--- a/locales/nl/common.json
+++ b/locales/nl/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Account kiezen",
     "select_mailto_account": "Kies welk account deze e-maillink moet openen.",
     "select_webcal_account": "Kies welk account deze kalenderlink moet openen.",
-    "select_account_note": "Deze keuze geldt alleen voor deze protocol-link.",
     "detail_to": "Aan",
     "detail_subject": "Onderwerp",
     "detail_no_subject": "Geen onderwerp",
@@ -1073,7 +1072,7 @@
     "recipients_partly_refused": "De server heeft {recipients} geweigerd. De andere ontvangers krijgen het bericht.",
     "send_offline": "Je lijkt offline te zijn. Het bericht staat er nog; verstuur het opnieuw zodra je weer online bent.",
     "formatting": "Opmaak",
-    "send_recipients_rejected": "Niet verzonden - de server heeft alle ontvangers geweigerd.",
+    "send_recipients_rejected": "Niet verzonden: de server heeft alle ontvangers geweigerd.",
     "send_plugin_failed": "Niet verzonden - een plug-in die het verzenden afhandelt, is mislukt of duurde te lang. Controleer je map Verzonden voordat je opnieuw verzendt.",
     "send_some_recipients_rejected": "Verzonden, maar niet naar deze ontvangers - de server heeft ze geweigerd.",
     "continue_draft": "Concept voortzetten",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Zet eerst crashrapporten aan.",
     "send_no_url": "Er is geen adres ingesteld, dus dit kan nergens heen. Vul hierboven een adres in.",
     "send_failed": "Het crashrapport kon niet worden verzonden."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Aantal ongelezen op het taakbalkpictogram",
+    "unread_badge_description": "Zo ziet u nieuwe mail terwijl u in een andere app werkt.",
+    "tip_compose_keys": "Druk op {keys} om een nieuw bericht te schrijven",
+    "tip_palette_keys": "Druk op {keys} om elke opdracht te vinden"
   }
 }
diff --git a/locales/pl/common.json b/locales/pl/common.json
index 967151b32..fa5c549ca 100644
--- a/locales/pl/common.json
+++ b/locales/pl/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Wybierz konto",
     "select_mailto_account": "Wybierz konto, które ma otworzyć ten link e-mail.",
     "select_webcal_account": "Wybierz konto, które ma otworzyć ten link kalendarza.",
-    "select_account_note": "Ten wybór dotyczy tylko tego linku protokołu.",
     "detail_to": "Do",
     "detail_subject": "Temat",
     "detail_no_subject": "Bez tematu",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Najpierw włącz raporty o awariach.",
     "send_no_url": "Nie ustawiono adresu, więc nie ma dokąd tego wysłać. Wpisz go powyżej.",
     "send_failed": "Nie udało się wysłać raportu o awarii."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Liczba nieprzeczytanych na ikonie na pasku zadań",
+    "unread_badge_description": "Aby widzieć nową pocztę, gdy pracujesz w innej aplikacji.",
+    "tip_compose_keys": "Naciśnij {keys}, aby napisać nową wiadomość",
+    "tip_palette_keys": "Naciśnij {keys}, aby znaleźć dowolne polecenie"
   }
 }
diff --git a/locales/pt/common.json b/locales/pt/common.json
index 38f735514..f90148149 100644
--- a/locales/pt/common.json
+++ b/locales/pt/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Escolher conta",
     "select_mailto_account": "Escolha qual conta deve abrir este link de e-mail.",
     "select_webcal_account": "Escolha qual conta deve abrir este link de calendário.",
-    "select_account_note": "Esta escolha se aplica apenas a este link de protocolo.",
     "detail_to": "Para",
     "detail_subject": "Assunto",
     "detail_no_subject": "Sem assunto",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Ligue primeiro os relatórios de falhas.",
     "send_no_url": "Não há nenhum endereço definido, por isso não há para onde enviar. Introduza um acima.",
     "send_failed": "Não foi possível enviar o relatório de falha."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Número de não lidas no ícone da barra de tarefas",
+    "unread_badge_description": "Para ver novos e-mails enquanto trabalha noutra aplicação.",
+    "tip_compose_keys": "Prima {keys} para escrever uma nova mensagem",
+    "tip_palette_keys": "Prima {keys} para encontrar qualquer comando"
   }
 }
diff --git a/locales/ro/common.json b/locales/ro/common.json
index 3a7e51e24..93fa2b0eb 100644
--- a/locales/ro/common.json
+++ b/locales/ro/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Alegeți contul",
     "select_mailto_account": "Alegeți contul în care să se deschidă acest link de e-mail.",
     "select_webcal_account": "Alegeți contul care ar trebui să deschidă acest link către calendar.",
-    "select_account_note": "Aceasta se aplică numai acestui link de protocol.",
     "detail_to": "Către",
     "detail_subject": "Subiect",
     "detail_no_subject": "Fără subiect",
@@ -1069,7 +1068,7 @@
     "recipients_partly_refused": "Serverul a respins {recipients}. Ceilalți destinatari primesc mesajul.",
     "send_offline": "Se pare că ești offline. Mesajul este încă aici; trimite-l din nou când revii online.",
     "formatting": "Formatare",
-    "send_recipients_rejected": "Netrimis - serverul a respins toți destinatarii.",
+    "send_recipients_rejected": "Netrimis: serverul a respins toți destinatarii.",
     "send_plugin_failed": "Nu a fost trimis - un plugin care se ocupă de trimitere a eșuat sau a durat prea mult. Verifică dosarul Trimise înainte de a trimite din nou.",
     "send_some_recipients_rejected": "Trimis, dar nu și acestor destinatari - serverul i-a respins.",
     "continue_draft": "Continuă schița",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Porniți mai întâi rapoartele de blocare.",
     "send_no_url": "Nu este setată nicio adresă, deci nu există unde să fie trimis. Introduceți una mai sus.",
     "send_failed": "Raportul de blocare nu a putut fi trimis."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Numărul de necitite pe pictograma din bara de activități",
+    "unread_badge_description": "Ca să vedeți e-mailurile noi în timp ce lucrați în altă aplicație.",
+    "tip_compose_keys": "Apăsați {keys} pentru a scrie un mesaj nou",
+    "tip_palette_keys": "Apăsați {keys} pentru a găsi orice comandă"
   }
 }
diff --git a/locales/ru/common.json b/locales/ru/common.json
index 330b5db3b..8052d5874 100644
--- a/locales/ru/common.json
+++ b/locales/ru/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Выберите аккаунт",
     "select_mailto_account": "Выберите, в каком аккаунте открыть эту ссылку электронной почты.",
     "select_webcal_account": "Выберите, в каком аккаунте открыть эту ссылку календаря.",
-    "select_account_note": "Этот выбор применяется только к этой ссылке протокола.",
     "detail_to": "Кому",
     "detail_subject": "Тема",
     "detail_no_subject": "Без темы",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Сначала включите отчёты о сбоях.",
     "send_no_url": "Адрес не задан, поэтому отправлять некуда. Введите его выше.",
     "send_failed": "Не удалось отправить отчёт о сбое."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Число непрочитанных на значке на панели задач",
+    "unread_badge_description": "Чтобы видеть новую почту, пока вы работаете в другом приложении.",
+    "tip_compose_keys": "Нажмите {keys}, чтобы написать новое письмо",
+    "tip_palette_keys": "Нажмите {keys}, чтобы найти любую команду"
   }
 }
diff --git a/locales/sk/common.json b/locales/sk/common.json
index 23b06e682..790488e48 100644
--- a/locales/sk/common.json
+++ b/locales/sk/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Vybrať účet",
     "select_mailto_account": "Vyberte účet, v ktorom sa má tento e-mailový odkaz otvoriť.",
     "select_webcal_account": "Vyberte účet, v ktorom sa má tento kalendárový odkaz otvoriť.",
-    "select_account_note": "Toto platí iba pre tento odkaz protokolu.",
     "detail_to": "Komu",
     "detail_subject": "Predmet",
     "detail_no_subject": "Bez predmetu",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Najprv zapnite hlásenia o zlyhaniach.",
     "send_no_url": "Nie je nastavená žiadna adresa, takže to nie je kam odoslať. Zadajte ju vyššie.",
     "send_failed": "Hlásenie o zlyhaní sa nepodarilo odoslať."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Počet neprečítaných na ikone na paneli úloh",
+    "unread_badge_description": "Aby ste videli novú poštu, aj keď pracujete v inej aplikácii.",
+    "tip_compose_keys": "Stlačte {keys} a napíšte novú správu",
+    "tip_palette_keys": "Stlačte {keys} a nájdite akýkoľvek príkaz"
   }
 }
diff --git a/locales/th/common.json b/locales/th/common.json
index 9438fc57d..9d4190ec3 100644
--- a/locales/th/common.json
+++ b/locales/th/common.json
@@ -1448,7 +1448,7 @@
     "submission_limit": "เซิร์ฟเวอร์ปฏิเสธการส่งข้อความเนื่องจากเกินขีดจำกัด: {reason}",
     "recipients_refused": "ส่งไม่สำเร็จ: เซิร์ฟเวอร์ปฏิเสธผู้รับ {recipients}",
     "recipients_partly_refused": "เซิร์ฟเวอร์ปฏิเสธผู้รับ {recipients} แต่ผู้รับรายอื่นจะยังคงได้รับข้อความ",
-    "send_recipients_rejected": "ส่งไม่สำเร็จ - เซิร์ฟเวอร์ปฏิเสธผู้รับทุกคน",
+    "send_recipients_rejected": "ส่งไม่สำเร็จ: เซิร์ฟเวอร์ปฏิเสธผู้รับทุกคน",
     "cut": "ตัด",
     "copy": "คัดลอก",
     "send_plugin_failed": "ส่งไม่สำเร็จ - ปลั๊กอินที่จัดการการส่งเกิดข้อผิดพลาด กรุณาตรวจสอบโฟลเดอร์ส่งแล้วก่อนส่งซ้ำ",
@@ -2716,7 +2716,6 @@
     "select_account_title": "เลือกบัญชี",
     "select_mailto_account": "เลือกบัญชีที่ต้องการให้เปิดลิงก์อีเมลนี้",
     "select_webcal_account": "เลือกบัญชีที่ต้องการให้เปิดลิงก์ปฏิทินนี้",
-    "select_account_note": "การตั้งค่านี้มีผลเฉพาะกับลิงก์โปรโตคอลนี้เท่านั้น",
     "detail_to": "ถึง",
     "detail_subject": "เรื่อง",
     "detail_no_subject": "ไม่มีหัวข้อเรื่อง",
@@ -7599,5 +7598,11 @@
     "send_no_consent": "เปิดรายงานข้อขัดข้องก่อน",
     "send_no_url": "ไม่ได้ตั้งที่อยู่ จึงไม่มีปลายทางให้ส่ง ป้อนที่อยู่ด้านบน",
     "send_failed": "ไม่สามารถส่งรายงานข้อขัดข้องได้"
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "จำนวนที่ยังไม่อ่านบนไอคอนในแถบงาน",
+    "unread_badge_description": "เพื่อให้เห็นอีเมลใหม่ขณะทำงานในแอปอื่น",
+    "tip_compose_keys": "กด {keys} เพื่อเขียนข้อความใหม่",
+    "tip_palette_keys": "กด {keys} เพื่อค้นหาคำสั่งใดก็ได้"
   }
 }
diff --git a/locales/tr/common.json b/locales/tr/common.json
index 5b4ff5458..0d6afff90 100644
--- a/locales/tr/common.json
+++ b/locales/tr/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Hesap seç",
     "select_mailto_account": "Bu e-posta bağlantısını hangi hesabın açacağını seçin.",
     "select_webcal_account": "Bu takvim bağlantısını hangi hesabın açacağını seçin.",
-    "select_account_note": "Bu seçim yalnızca bu protokol bağlantısı için geçerlidir.",
     "detail_to": "Kime",
     "detail_subject": "Konu",
     "detail_no_subject": "Konu yok",
@@ -1069,7 +1068,7 @@
     "recipients_partly_refused": "Sunucu şu alıcıları reddetti: {recipients}. Diğer alıcılar iletiyi alır.",
     "send_offline": "Çevrimdışı görünüyorsunuz. İleti hâlâ burada; yeniden çevrimiçi olduğunuzda tekrar gönderin.",
     "formatting": "Biçimlendirme",
-    "send_recipients_rejected": "Gönderilmedi - sunucu tüm alıcıları reddetti.",
+    "send_recipients_rejected": "Gönderilmedi: sunucu tüm alıcıları reddetti.",
     "send_plugin_failed": "Gönderilmedi - gönderimi üstlenen bir eklenti başarısız oldu ya da çok uzun sürdü. Yeniden göndermeden önce Gönderilenler klasörünü kontrol edin.",
     "send_some_recipients_rejected": "Gönderildi, ancak bu alıcılara değil - sunucu onları reddetti.",
     "continue_draft": "Taslağa devam et",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Önce kilitlenme raporlarını açın.",
     "send_no_url": "Adres ayarlanmadı, bu yüzden gönderilecek yer yok. Yukarıya bir adres girin.",
     "send_failed": "Kilitlenme raporu gönderilemedi."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Görev çubuğu simgesinde okunmamış sayısı",
+    "unread_badge_description": "Başka bir uygulamada çalışırken yeni postayı görmeniz için.",
+    "tip_compose_keys": "Yeni bir ileti yazmak için {keys} tuşlarına basın",
+    "tip_palette_keys": "Herhangi bir komutu bulmak için {keys} tuşlarına basın"
   }
 }
diff --git a/locales/uk/common.json b/locales/uk/common.json
index 76943086a..b85307979 100644
--- a/locales/uk/common.json
+++ b/locales/uk/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Виберіть акаунт",
     "select_mailto_account": "Виберіть акаунт, у якому слід відкрити це посилання електронної пошти.",
     "select_webcal_account": "Виберіть акаунт, у якому слід відкрити це посилання календаря.",
-    "select_account_note": "Цей вибір застосовується лише до цього посилання протоколу.",
     "detail_to": "Кому",
     "detail_subject": "Тема",
     "detail_no_subject": "Без теми",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "Спочатку ввімкніть звіти про збої.",
     "send_no_url": "Адресу не задано, тому надсилати нікуди. Введіть її вище.",
     "send_failed": "Не вдалося надіслати звіт про збій."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Кількість непрочитаних на значку на панелі завдань",
+    "unread_badge_description": "Щоб бачити нову пошту, поки ви працюєте в іншому застосунку.",
+    "tip_compose_keys": "Натисніть {keys}, щоб написати новий лист",
+    "tip_palette_keys": "Натисніть {keys}, щоб знайти будь-яку команду"
   }
 }
diff --git a/locales/vi/common.json b/locales/vi/common.json
index 9446ee938..e7ecb326e 100644
--- a/locales/vi/common.json
+++ b/locales/vi/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "Chọn tài khoản",
     "select_mailto_account": "Chọn tài khoản nào sẽ mở liên kết email này.",
     "select_webcal_account": "Chọn tài khoản nào sẽ mở liên kết lịch này.",
-    "select_account_note": "Điều này chỉ áp dụng cho liên kết giao thức này.",
     "detail_to": "Đến",
     "detail_subject": "Tiêu đề",
     "detail_no_subject": "Không có tiêu đề",
@@ -7603,5 +7602,11 @@
     "send_no_consent": "Hãy bật báo cáo sự cố trước.",
     "send_no_url": "Chưa đặt địa chỉ nên không có nơi để gửi. Hãy nhập một địa chỉ ở trên.",
     "send_failed": "Không thể gửi báo cáo sự cố."
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "Số thư chưa đọc trên biểu tượng thanh tác vụ",
+    "unread_badge_description": "Để bạn thấy thư mới khi đang làm việc trong ứng dụng khác.",
+    "tip_compose_keys": "Nhấn {keys} để viết thư mới",
+    "tip_palette_keys": "Nhấn {keys} để tìm bất kỳ lệnh nào"
   }
 }
diff --git a/locales/zh-TW/common.json b/locales/zh-TW/common.json
index 117ac1f87..248d6f5c9 100644
--- a/locales/zh-TW/common.json
+++ b/locales/zh-TW/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "選擇帳號",
     "select_mailto_account": "選擇用於開啟此電子郵件連結的帳號。",
     "select_webcal_account": "選擇用於開啟此行事曆連結的帳號。",
-    "select_account_note": "此選擇僅適用於此協議連結。",
     "detail_to": "收件者",
     "detail_subject": "主題",
     "detail_no_subject": "無主題",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "請先開啟當機報告。",
     "send_no_url": "未設定地址，因此無處傳送。請在上方輸入一個。",
     "send_failed": "無法傳送當機報告。"
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "在工作列圖示上顯示未讀數",
+    "unread_badge_description": "這樣您在其他應用程式中工作時也能看到新郵件。",
+    "tip_compose_keys": "按 {keys} 撰寫新郵件",
+    "tip_palette_keys": "按 {keys} 尋找任何指令"
   }
 }
diff --git a/locales/zh/common.json b/locales/zh/common.json
index ca8ae5eac..892b9af80 100644
--- a/locales/zh/common.json
+++ b/locales/zh/common.json
@@ -245,7 +245,6 @@
     "select_account_title": "选择账户",
     "select_mailto_account": "选择用于打开此电子邮件链接的账户。",
     "select_webcal_account": "选择用于打开此日历链接的账户。",
-    "select_account_note": "此选择仅适用于此协议链接。",
     "detail_to": "收件人",
     "detail_subject": "主题",
     "detail_no_subject": "无主题",
@@ -7591,5 +7590,11 @@
     "send_no_consent": "请先开启崩溃报告。",
     "send_no_url": "未设置地址，因此无处发送。请在上方输入一个。",
     "send_failed": "无法发送崩溃报告。"
+  },
+  "uxp2_desktop": {
+    "unread_badge_label": "在任务栏图标上显示未读数",
+    "unread_badge_description": "这样您在其他应用中工作时也能看到新邮件。",
+    "tip_compose_keys": "按 {keys} 写新邮件",
+    "tip_palette_keys": "按 {keys} 查找任何命令"
   }
 }