diff --git a/scripts/i18n/scan-hardcoded.ts b/scripts/i18n/scan-hardcoded.ts
index c36cbf1e..21636ead 100755
--- a/scripts/i18n/scan-hardcoded.ts
+++ b/scripts/i18n/scan-hardcoded.ts
@@ -52,7 +52,10 @@ const Q = String.raw`(?:"([^"\n]{2,120})"|'([^'\n]{2,120})')`;
  */
 const PATTERNS: { kind: string; rx: RegExp; neverTranslate?: true }[] = [
   // >Some visible words<
-  { kind: 'jsx text', rx: />\s*([A-Z][A-Za-z0-9][^<>{}\n]{2,100}?)\s*</g },
+  //
+  // The lookbehind rejects `=>`, so an arrow return type does not read as JSX text: `(id: string) =>
+  // Promise<unknown>` was reported as the string "Promise".
+  { kind: 'jsx text', rx: /(?<!=)>\s*([A-Z][A-Za-z0-9][^<>{}\n]{2,100}?)\s*</g },
   // placeholder="..." and friends
   {
     kind: 'attributes',
diff --git a/src/workspaces/officerdev/src/apps/ChatHistory/ChatDetailPanel.tsx b/src/workspaces/officerdev/src/apps/ChatHistory/ChatDetailPanel.tsx
index ba8b5ea7..aabb9bff 100644
--- a/src/workspaces/officerdev/src/apps/ChatHistory/ChatDetailPanel.tsx
+++ b/src/workspaces/officerdev/src/apps/ChatHistory/ChatDetailPanel.tsx
@@ -12,6 +12,7 @@ import { useClaudeSessions } from 'state/useClaudeSessions';
 import type { NotifyPreference } from 'state/useClaudeSessions';
 import { useChat, EmbeddableChat } from '../Chat';
 import type { ChatMessage } from '../Chat/types';
+import { useTranslation } from '../../locales';
 
 export type SelectedSession = {
   id: string;
@@ -71,6 +72,7 @@ function DetailBar({
   onDisconnect,
   notifyPreference,
 }: DetailBarProps) {
+  const { t } = useTranslation();
   // The id to rename comes from the URL, not from `resumeSessionId`. They are the same for an ordinary
   // conversation and not for a merged `/clear` chain, where the resume target is the tail transcript
   // while the list, the links and the server all address the chain by its head. Renaming the tail would
@@ -115,11 +117,11 @@ function DetailBar({
       </div>
       <div className="flex-1 min-w-0 px-3 text-center">
         <EditableTitle
-          value={sessionTitle ?? 'New chat'}
+          value={sessionTitle ?? t('chatHistory.newChatTitle')}
           onCommit={commitRename}
           readOnly={!sessionId}
-          ariaLabel="Session title"
-          hint="Click to rename this chat"
+          ariaLabel={t('chatHistory.sessionTitle')}
+          hint={t('chatHistory.renameHint')}
           className="block w-full cursor-text truncate text-sm font-medium text-foreground/80 transition-opacity hover:opacity-70"
           inputClassName="w-full border-b border-primary/40 bg-transparent text-center text-sm font-medium text-foreground/80 outline-none"
         />
@@ -142,7 +144,7 @@ function DetailBar({
           <button
             type="button"
             onClick={onDisconnect}
-            title="End session — kills any running turn and releases it so it can be resumed elsewhere"
+            title={t('chatHistory.endSession')}
             className="ml-1 p-1 rounded hover:bg-muted hover:text-destructive transition-colors cursor-pointer"
           >
             <Unplug className="h-3.5 w-3.5" />
@@ -177,6 +179,7 @@ type NewChatProps = {
 };
 
 function NewChat(props: NewChatProps) {
+  const { t } = useTranslation();
   const { resumeSummary, resumeSessionId, initialMessages, total, initialOffset, sessionCwd, planMode } = props;
   const location = useLocation();
   const locationState = location.state as ChatLocationState;
@@ -254,6 +257,7 @@ function NewChat(props: NewChatProps) {
 }
 
 export const ChatDetailPanel = () => {
+  const { t } = useTranslation();
   const [selected] = useSelectedChatSession();
 
   // Name the page after the conversation, whenever the URL names a real one. Gated on the route param
@@ -284,7 +288,7 @@ export const ChatDetailPanel = () => {
   if (!selected) {
     return (
       <div className="h-full flex items-center justify-center text-muted-foreground text-sm">
-        Select a session to view
+        {t('chatHistory.selectSession')}
       </div>
     );
   }
diff --git a/src/workspaces/officerdev/src/apps/ChatHistory/DirPickerModal.tsx b/src/workspaces/officerdev/src/apps/ChatHistory/DirPickerModal.tsx
index 18004c52..6759f0e4 100644
--- a/src/workspaces/officerdev/src/apps/ChatHistory/DirPickerModal.tsx
+++ b/src/workspaces/officerdev/src/apps/ChatHistory/DirPickerModal.tsx
@@ -3,6 +3,7 @@ import { useQuery } from '@tanstack/react-query';
 import { Folder, ChevronRight, Loader2, FolderPlus, Check, Eye, EyeOff } from 'lucide-react';
 import { Dialog, DialogContent, DialogHeader, DialogTitle } from '@/components/ui/dialog';
 import { useFilesAPI, type DirEntry } from '../../hooks/useFilesAPI';
+import { useTranslation } from '../../locales';
 
 type DirPickerModalProps = {
   open: boolean;
@@ -13,6 +14,7 @@ type DirPickerModalProps = {
 // A simplified file-browser modal for picking a working directory (returns an absolute path).
 // Navigates within the home root; dirs elsewhere are reachable via the selector's free-text field.
 export const DirPickerModal = ({ open, onClose, onSelect }: DirPickerModalProps) => {
+  const { t, tUi } = useTranslation();
   const api = useFilesAPI('home');
   const [path, setPath] = useState('/'); // root-relative, always starts with '/'
   const [creating, setCreating] = useState(false);
@@ -54,7 +56,7 @@ export const DirPickerModal = ({ open, onClose, onSelect }: DirPickerModalProps)
     <Dialog open={open} onOpenChange={(o) => !o && onClose()}>
       <DialogContent className="flex h-[70vh] max-w-2xl flex-col gap-0 p-0">
         <DialogHeader className="border-b border-border px-4 py-3">
-          <DialogTitle className="text-sm">Choose a working directory</DialogTitle>
+          <DialogTitle className="text-sm">{t('chatHistory.chooseDir')}</DialogTitle>
         </DialogHeader>
 
         {/* Breadcrumb */}
@@ -82,9 +84,7 @@ export const DirPickerModal = ({ open, onClose, onSelect }: DirPickerModalProps)
             // Say when the folder isn't actually empty, just filtered — "No subfolders here" over a
             // directory holding thirty dot-folders is a lie the toggle below can't help you spot.
             <div className="flex h-full items-center justify-center px-4 text-center text-sm opacity-40">
-              {hiddenCount > 0
-                ? `No visible subfolders — ${hiddenCount} hidden ${hiddenCount === 1 ? 'one is' : 'ones are'} filtered out`
-                : 'No subfolders here'}
+              {hiddenCount > 0 ? t('chatHistory.noSubfolders', { count: hiddenCount }) : 'No subfolders here'}
             </div>
           ) : (
             dirs.map((d) => (
@@ -113,14 +113,14 @@ export const DirPickerModal = ({ open, onClose, onSelect }: DirPickerModalProps)
                 onKeyDown={(ev) => {
                   if (ev.key === 'Escape') setCreating(false);
                 }}
-                placeholder="New folder name"
+                placeholder={t('chatHistory.newFolderName')}
                 className="min-w-0 flex-1 rounded border border-border bg-transparent px-2 py-1 text-xs outline-none"
               />
               <button
                 type="submit"
                 className="rounded px-2 py-1 text-xs text-duck-teal hover:bg-duck-teal/10 cursor-pointer"
               >
-                Create
+                {t('chatHistory.create')}
               </button>
             </form>
           ) : (
@@ -129,7 +129,7 @@ export const DirPickerModal = ({ open, onClose, onSelect }: DirPickerModalProps)
                 onClick={() => setCreating(true)}
                 className="flex items-center gap-1.5 text-xs opacity-60 hover:opacity-100 cursor-pointer"
               >
-                <FolderPlus className="h-3.5 w-3.5" /> New folder
+                <FolderPlus className="h-3.5 w-3.5" /> {t('chatHistory.newFolder')}
               </button>
               {/* Shown even at zero, so the control's state is always legible: a folder with nothing
                   hidden and one with everything hidden must not look identical. */}
@@ -139,7 +139,11 @@ export const DirPickerModal = ({ open, onClose, onSelect }: DirPickerModalProps)
                 className="flex items-center gap-1.5 text-xs opacity-60 hover:opacity-100 cursor-pointer"
               >
                 {showHidden ? <EyeOff className="h-3.5 w-3.5" /> : <Eye className="h-3.5 w-3.5" />}
-                {showHidden ? 'Hide hidden' : `Show hidden${hiddenCount > 0 ? ` (${hiddenCount})` : ''}`}
+                {showHidden
+                  ? t('chatHistory.hideHidden')
+                  : hiddenCount > 0
+                    ? t('chatHistory.showHiddenCount', { count: hiddenCount })
+                    : t('chatHistory.showHidden')}
               </button>
             </div>
           )}
@@ -151,7 +155,7 @@ export const DirPickerModal = ({ open, onClose, onSelect }: DirPickerModalProps)
               onClick={onClose}
               className="rounded-md px-3 py-1.5 text-sm opacity-60 hover:opacity-100 cursor-pointer"
             >
-              Cancel
+              {tUi('button.cancel')}
             </button>
             <button
               onClick={() => {
@@ -161,7 +165,7 @@ export const DirPickerModal = ({ open, onClose, onSelect }: DirPickerModalProps)
               disabled={!absCurrent}
               className="flex items-center gap-1.5 rounded-md bg-duck-teal px-3 py-1.5 text-sm font-medium text-duck-yellow hover:bg-duck-teal/90 disabled:opacity-50 cursor-pointer"
             >
-              <Check className="h-3.5 w-3.5" /> Select this folder
+              <Check className="h-3.5 w-3.5" /> {t('chatHistory.selectFolder')}
             </button>
           </div>
         </div>
diff --git a/src/workspaces/officerdev/src/apps/ChatHistory/NotifyMenu.tsx b/src/workspaces/officerdev/src/apps/ChatHistory/NotifyMenu.tsx
index 3017c2ed..918602bc 100644
--- a/src/workspaces/officerdev/src/apps/ChatHistory/NotifyMenu.tsx
+++ b/src/workspaces/officerdev/src/apps/ChatHistory/NotifyMenu.tsx
@@ -1,13 +1,15 @@
 import { Bell, BellOff, Check } from 'lucide-react';
 import * as Dropdown from '@/components/ui/dropdown-menu';
 import type { NotifyPreference } from 'state/useClaudeSessions';
+import type { PanelTranslationKey } from '../../locales';
+import { useTranslation } from '../../locales';
 
 const { DropdownMenu, DropdownMenuContent, DropdownMenuItem, DropdownMenuTrigger } = Dropdown;
 
-const OPTIONS: { value: NotifyPreference; label: string }[] = [
-  { value: 'every_turn', label: 'Every end of turn' },
-  { value: 'input_needed', label: 'Only when input is needed' },
-  { value: 'none', label: 'None' },
+const OPTIONS: { value: NotifyPreference; labelKey: PanelTranslationKey }[] = [
+  { value: 'every_turn', labelKey: 'chatHistory.notify.everyTurn' },
+  { value: 'input_needed', labelKey: 'chatHistory.notify.inputNeeded' },
+  { value: 'none', labelKey: 'chatHistory.notify.none' },
 ];
 
 /**
@@ -40,6 +42,7 @@ type NotifyMenuProps = {
  * variant, which nothing here uses.
  */
 export const NotifyMenu = ({ preference, onChange }: NotifyMenuProps) => {
+  const { t } = useTranslation();
   const pick = (value: NotifyPreference) => {
     onChange(value);
     // Lazy, first-opt-in request — the only place this fires. A denial or an already-decided answer is a
@@ -55,8 +58,10 @@ export const NotifyMenu = ({ preference, onChange }: NotifyMenuProps) => {
       <DropdownMenuTrigger asChild>
         <button
           type="button"
-          title={`Notifications: ${OPTIONS.find((o) => o.value === preference)?.label ?? 'None'}`}
-          aria-label="Notification preference"
+          title={t('chatHistory.notificationsLabel', {
+            choice: t(OPTIONS.find((o) => o.value === preference)?.labelKey ?? 'chatHistory.notify.none'),
+          })}
+          aria-label={t('chatHistory.notifyPreference')}
           className={`rounded p-1 transition-colors hover:bg-muted cursor-pointer ${BELL_TONE[preference]}`}
         >
           {preference === 'none' ? <BellOff className="h-3.5 w-3.5" /> : <Bell className="h-3.5 w-3.5" />}
@@ -66,7 +71,7 @@ export const NotifyMenu = ({ preference, onChange }: NotifyMenuProps) => {
         {OPTIONS.map((opt) => (
           <DropdownMenuItem key={opt.value} className="cursor-pointer" onClick={() => pick(opt.value)}>
             <Check className={`mr-2 h-4 w-4 ${opt.value === preference ? 'opacity-100' : 'opacity-0'}`} />
-            {opt.label}
+            {t(opt.labelKey)}
           </DropdownMenuItem>
         ))}
       </DropdownMenuContent>
diff --git a/src/workspaces/officerdev/src/apps/ChatHistory/SessionList.tsx b/src/workspaces/officerdev/src/apps/ChatHistory/SessionList.tsx
index 63a2d13f..3d44b99c 100644
--- a/src/workspaces/officerdev/src/apps/ChatHistory/SessionList.tsx
+++ b/src/workspaces/officerdev/src/apps/ChatHistory/SessionList.tsx
@@ -13,6 +13,8 @@ import { chatNewPath, chatSessionPath, cwdFromSplat } from './chat-routes';
 import { DirPickerModal } from './DirPickerModal';
 import { LiveMarker, SessionRow, shortenPath, useScrollActiveIntoView, useSessionRowActions } from './SessionRow';
 import { SessionTree } from './SessionTree';
+import type { PanelTranslationKey } from '../../locales';
+import { useTranslation } from '../../locales';
 
 /*
   The /chat sidebar: one panel, three views.
@@ -30,10 +32,10 @@ import { SessionTree } from './SessionTree';
 
 type View = 'tree' | 'latest' | 'live';
 
-const TABS: { value: View; label: string }[] = [
-  { value: 'tree', label: 'Tree' },
-  { value: 'latest', label: 'Latest' },
-  { value: 'live', label: 'Live' },
+const TABS: { value: View; labelKey: PanelTranslationKey }[] = [
+  { value: 'tree', labelKey: 'chatHistory.tabs.tree' },
+  { value: 'latest', labelKey: 'chatHistory.tabs.latest' },
+  { value: 'live', labelKey: 'chatHistory.tabs.live' },
 ];
 
 /*
@@ -52,6 +54,7 @@ const LIVE_KIND_KEY = 'chat.sessions.liveKind';
 const EXPANDED_KEY = 'chat.sessions.expanded';
 
 export const SessionList = () => {
+  const { t } = useTranslation();
   const navigate = useNavigate();
   // Which session is open, and which project group we're browsing, both come from the route. Reading them
   // there rather than from the selection channel means the highlight and the group are correct on a deep
@@ -157,7 +160,7 @@ export const SessionList = () => {
                 value={tab.value}
                 className="flex-1 cursor-pointer rounded-md border border-transparent px-2 py-1 text-xs font-medium leading-normal ring-0 transition-all hover:bg-foreground/5 hover:text-foreground focus-visible:ring-0 data-[state=active]:border-border data-[state=active]:bg-background data-[state=active]:text-foreground data-[state=active]:shadow-sm"
               >
-                {tab.label}
+                {t(tab.labelKey)}
                 {/* The count that decides whether Live is worth a click. Only when non-zero — a permanent
                     `0` is the same as no information. */}
                 {tab.value === 'live' && liveSessions.length > 0 && (
@@ -173,8 +176,8 @@ export const SessionList = () => {
           <button
             onClick={refresh}
             className="cursor-pointer rounded p-1.5 text-muted-foreground transition-colors hover:text-foreground"
-            title="Refresh"
-            aria-label="Refresh sessions"
+            title={t('chatHistory.refresh')}
+            aria-label={t('chatHistory.refreshSessions')}
           >
             <RefreshCw className={`h-3.5 w-3.5 ${latest.isLoading ? 'animate-spin' : ''}`} />
           </button>
@@ -184,10 +187,10 @@ export const SessionList = () => {
           <button
             onClick={() => setBrowsing(true)}
             className="flex cursor-pointer items-center gap-1 rounded-md bg-primary px-2 py-1 text-xs font-medium text-primary-foreground transition-opacity hover:opacity-90"
-            title="New chat in a directory…"
+            title={t('chatHistory.newChatInDir')}
           >
             <Plus className="h-3.5 w-3.5" />
-            New Chat
+            {t('chatHistory.newChat')}
           </button>
         </div>
       </div>
@@ -209,25 +212,25 @@ export const SessionList = () => {
           <>
             {latest.error ? (
               <ErrorBlock
-                title="Could not load sessions"
+                title={t('chatHistory.loadFailed')}
                 message={errorText(latest.error)}
                 action={
                   <button
                     onClick={() => void latest.refetch()}
                     className="cursor-pointer rounded-md bg-primary px-3 py-1.5 text-xs font-medium text-primary-foreground"
                   >
-                    Try again
+                    {t('chatHistory.tryAgain')}
                   </button>
                 }
               />
             ) : latest.isLoading && latest.sessions.length === 0 ? (
               // Loading and empty used to be the same grey line of text, so a slow read looked like an
               // account with no history.
-              <LoadingBlock label="Reading transcripts…" />
+              <LoadingBlock label={t('chatHistory.reading')} />
             ) : latest.sessions.length === 0 ? (
               <EmptyBlock
                 icon={MessageSquare}
-                title="No sessions yet"
+                title={t('chatHistory.noSessions')}
                 hint="Every conversation you have had shows up here, newest first. Start one with New Chat."
               />
             ) : (
@@ -277,12 +280,13 @@ export const SessionList = () => {
 */
 type LiveKind = 'agents' | 'commanders';
 
-const LIVE_TABS: { value: LiveKind; label: string }[] = [
-  { value: 'agents', label: 'Agents' },
-  { value: 'commanders', label: 'Commanders' },
+const LIVE_TABS: { value: LiveKind; labelKey: PanelTranslationKey }[] = [
+  { value: 'agents', labelKey: 'chatHistory.tabs.agents' },
+  { value: 'commanders', labelKey: 'chatHistory.tabs.commanders' },
 ];
 
 const LiveView = ({ activeId, home }: { activeId?: string; home: string | null }) => {
+  const { t } = useTranslation();
   const { live: sessions, isLoading, error, refetch } = useLiveSessions();
   const [kind, setKind] = useLocalStorageState<LiveKind>(LIVE_KIND_KEY, 'agents');
 
@@ -297,20 +301,20 @@ const LiveView = ({ activeId, home }: { activeId?: string; home: string | null }
   if (error) {
     return (
       <ErrorBlock
-        title="Could not read live sessions"
+        title={t('chatHistory.liveFailed')}
         message={errorText(error)}
         action={
           <button
             onClick={() => void refetch()}
             className="cursor-pointer rounded-md bg-primary px-3 py-1.5 text-xs font-medium text-primary-foreground"
           >
-            Try again
+            {t('chatHistory.tryAgain')}
           </button>
         }
       />
     );
   }
-  if (isLoading && sessions.length === 0) return <LoadingBlock label="Asking the agent…" />;
+  if (isLoading && sessions.length === 0) return <LoadingBlock label={t('chatHistory.asking')} />;
 
   return (
     <div className="flex min-h-0 flex-1 flex-col">
@@ -328,7 +332,7 @@ const LiveView = ({ activeId, home }: { activeId?: string; home: string | null }
                 value={tab.value}
                 className="flex-1 cursor-pointer rounded-md border border-transparent px-2 py-1 text-xs font-medium leading-normal ring-0 transition-all hover:bg-foreground/5 hover:text-foreground focus-visible:ring-0 data-[state=active]:border-border data-[state=active]:bg-background data-[state=active]:text-foreground data-[state=active]:shadow-sm"
               >
-                {tab.label}
+                {t(tab.labelKey)}
                 <span className={`ml-1 tabular-nums ${count > 0 ? 'text-success' : 'opacity-50'}`}>({count})</span>
               </TabsTrigger>
             );
diff --git a/src/workspaces/officerdev/src/apps/ChatHistory/SessionRow.tsx b/src/workspaces/officerdev/src/apps/ChatHistory/SessionRow.tsx
index 64e5fdb2..0da99c55 100644
--- a/src/workspaces/officerdev/src/apps/ChatHistory/SessionRow.tsx
+++ b/src/workspaces/officerdev/src/apps/ChatHistory/SessionRow.tsx
@@ -5,6 +5,8 @@ import { DataRow, MetaItem, RelativeTime } from '@/components/Data';
 import { errorText } from 'helpers/error-text';
 import type { ClaudeSessionSummary, NotifyPreference } from 'state/useClaudeSessions';
 import { chatSessionPath } from './chat-routes';
+import { useTranslation } from '../../locales';
+import { Untranslated } from '@/components/Untranslated';
 
 /*
   One conversation, rendered the same way in all three tabs.
@@ -26,9 +28,13 @@ import { chatSessionPath } from './chat-routes';
  */
 export const HarnessBadge = ({ harness }: { harness?: 'claude' | 'opencode' }) =>
   harness === 'opencode' ? (
-    <span className="rounded bg-info/10 px-1.5 py-0.5 font-medium text-info">OpenCode</span>
+    <span className="rounded bg-info/10 px-1.5 py-0.5 font-medium text-info">
+      <Untranslated reason="product-name">OpenCode</Untranslated>
+    </span>
   ) : (
-    <span className="rounded bg-primary/10 px-1.5 py-0.5 font-medium text-primary">Claude</span>
+    <span className="rounded bg-primary/10 px-1.5 py-0.5 font-medium text-primary">
+      <Untranslated reason="product-name">Claude</Untranslated>
+    </span>
   );
 
 /**
@@ -113,6 +119,7 @@ export function useSessionRowActions(actions: {
   renameSession: (id: string, title: string) => Promise<unknown>;
   deleteSession: (id: string) => Promise<unknown>;
 }) {
+  const { t } = useTranslation();
   const [editingId, setEditingId] = useState<string | null>(null);
   const [editValue, setEditValue] = useState('');
   const [confirmingId, setConfirmingId] = useState<string | null>(null);
@@ -134,7 +141,7 @@ export function useSessionRowActions(actions: {
     try {
       await actions.renameSession(id, title);
     } catch (err) {
-      toast.error(`Could not rename the session: ${errorText(err)}`);
+      toast.error(t('chatHistory.renameFailed', { reason: errorText(err) }));
     }
   }, [editingId, editValue, actions]);
 
@@ -144,7 +151,7 @@ export function useSessionRowActions(actions: {
       try {
         await actions.deleteSession(id);
       } catch (err) {
-        toast.error(`Could not delete the session: ${errorText(err)}`);
+        toast.error(t('chatHistory.deleteFailed', { reason: errorText(err) }));
       }
     },
     [actions],
@@ -188,6 +195,7 @@ export const SessionRow = ({
   actions,
   activeRef,
 }: SessionRowProps) => {
+  const { t, tUi } = useTranslation();
   const isActive = activeId === session.id;
   const isEditing = actions.editingId === session.id;
   const isConfirming = actions.confirmingId === session.id;
@@ -209,15 +217,15 @@ export const SessionRow = ({
             if (ev.key === 'Escape') actions.setEditingId(null);
           }}
           onBlur={() => void actions.commitRename()}
-          aria-label="Session title"
+          aria-label={t('chatHistory.sessionTitle')}
           className="min-w-0 flex-1 border-b border-primary/40 bg-transparent text-sm outline-none"
         />
         <button
           type="submit"
           onMouseDown={(ev) => ev.preventDefault()}
           className="cursor-pointer p-1 text-success hover:opacity-80"
-          title="Save"
-          aria-label="Save title"
+          title={t('common.save')}
+          aria-label={t('chatHistory.saveTitle')}
         >
           <Check className="h-3.5 w-3.5" />
         </button>
@@ -226,8 +234,8 @@ export const SessionRow = ({
           onMouseDown={(ev) => ev.preventDefault()}
           onClick={() => actions.setEditingId(null)}
           className="cursor-pointer p-1 opacity-50 hover:opacity-100"
-          title="Cancel"
-          aria-label="Cancel rename"
+          title={tUi('button.cancel')}
+          aria-label={t('chatHistory.cancelRename')}
         >
           <X className="h-3.5 w-3.5" />
         </button>
@@ -279,21 +287,23 @@ export const SessionRow = ({
           {/* Say the size of it. Deleting a merged chain removes every part, and a row that looks like one
               conversation giving no warning that it is three files is exactly the surprise this prevents. */}
           <span className="text-xs text-destructive">
-            {session.partCount && session.partCount > 1 ? `Delete all ${session.partCount}?` : 'Delete?'}
+            {session.partCount && session.partCount > 1
+              ? t('chatHistory.deleteAll', { count: session.partCount })
+              : 'Delete?'}
           </span>
           <button
             onClick={() => void actions.handleDelete(session.id)}
             className="cursor-pointer rounded p-1 text-destructive hover:bg-destructive/10"
-            title="Confirm delete"
-            aria-label={`Confirm deleting ${session.title}`}
+            title={t('chatHistory.confirmDelete')}
+            aria-label={t('chatHistory.confirmDeletingNamed', { name: session.title })}
           >
             <Check className="h-3.5 w-3.5" />
           </button>
           <button
             onClick={() => actions.setConfirmingId(null)}
             className="cursor-pointer rounded p-1 opacity-50 hover:opacity-100"
-            title="Cancel"
-            aria-label="Cancel delete"
+            title={tUi('button.cancel')}
+            aria-label={t('chatHistory.cancelDelete')}
           >
             <X className="h-3.5 w-3.5" />
           </button>
@@ -304,16 +314,16 @@ export const SessionRow = ({
           <button
             onClick={() => actions.startRename(session.id, session.title)}
             className="cursor-pointer rounded p-1.5 text-muted-foreground transition-colors hover:text-foreground"
-            title="Rename"
-            aria-label={`Rename ${session.title}`}
+            title={t('chatHistory.rename')}
+            aria-label={t('chatHistory.renameNamed', { name: session.title })}
           >
             <Pencil className="h-3.5 w-3.5" />
           </button>
           <button
             onClick={() => actions.setConfirmingId(session.id)}
             className="cursor-pointer rounded p-1.5 text-muted-foreground transition-colors hover:text-destructive"
-            title="Delete session"
-            aria-label={`Delete ${session.title}`}
+            title={t('chatHistory.deleteSession')}
+            aria-label={t('chatHistory.deleteNamed', { name: session.title })}
           >
             <Trash2 className="h-3.5 w-3.5" />
           </button>
diff --git a/src/workspaces/officerdev/src/apps/ChatHistory/SessionTree.tsx b/src/workspaces/officerdev/src/apps/ChatHistory/SessionTree.tsx
index 06eb3f63..61066cd0 100644
--- a/src/workspaces/officerdev/src/apps/ChatHistory/SessionTree.tsx
+++ b/src/workspaces/officerdev/src/apps/ChatHistory/SessionTree.tsx
@@ -7,6 +7,7 @@ import type { LiveSession } from 'state/useLiveSessions';
 import { chatNewPath } from './chat-routes';
 import { SessionRow, shortenPath, type SessionRowActions, useScrollActiveIntoView } from './SessionRow';
 import { useSelectedChatSession } from '../../channels';
+import { useTranslation } from '../../locales';
 
 /*
   Directories as an accordion, each expanding to its own conversations.
@@ -36,6 +37,7 @@ type DirectoryNodeProps = {
 };
 
 const DirectoryNode = ({ pwd, home, expanded, onToggle, live, activeId, actions }: DirectoryNodeProps) => {
+  const { t } = useTranslation();
   const navigate = useNavigate();
   const [, setSelected] = useSelectedChatSession();
   const activeRef = useScrollActiveIntoView();
@@ -104,8 +106,8 @@ const DirectoryNode = ({ pwd, home, expanded, onToggle, live, activeId, actions
         <button
           type="button"
           onClick={startHere}
-          title={`New chat in ${shortenPath(pwd.cwd, home)}`}
-          aria-label={`New chat in ${shortenPath(pwd.cwd, home)}`}
+          title={t('chatHistory.newChatIn', { path: shortenPath(pwd.cwd, home) })}
+          aria-label={t('chatHistory.newChatIn', { path: shortenPath(pwd.cwd, home) })}
           className="mr-2 shrink-0 cursor-pointer rounded p-1.5 text-muted-foreground opacity-0 transition-opacity hover:text-foreground focus-visible:opacity-100 group-hover/dir:opacity-100"
         >
           <Plus className="h-3.5 w-3.5" />
@@ -123,11 +125,11 @@ const DirectoryNode = ({ pwd, home, expanded, onToggle, live, activeId, actions
       {expanded && (
         <div className="bg-background/40 py-2 pl-8">
           {isLoading && sessions.length === 0 ? (
-            <LoadingBlock label="Reading transcripts…" />
+            <LoadingBlock label={t('chatHistory.reading')} />
           ) : sessions.length === 0 ? (
             // Reachable: `/chat/pwds` counts transcripts per group, and a group can hold only files this
             // reader skips. Better than an accordion that opens onto nothing.
-            <div className="py-3 text-xs text-muted-foreground">No readable conversations here.</div>
+            <div className="py-3 text-xs text-muted-foreground">{t('chatHistory.noReadable')}</div>
           ) : (
             <DataList className="!h-auto !overflow-visible">
               {sessions.map((session) => (
@@ -167,11 +169,12 @@ export const SessionTree = ({
   activeId,
   actions,
 }: SessionTreeProps) => {
+  const { t } = useTranslation();
   if (!pwds.length) {
     return (
       <EmptyBlock
         icon={MessageSquare}
-        title="No conversations yet"
+        title={t('chatHistory.noConversations')}
         hint="Every directory you have run a chat in shows up here. Start one with New Chat."
       />
     );
diff --git a/src/workspaces/officerdev/src/locales/en-GB.json b/src/workspaces/officerdev/src/locales/en-GB.json
index e00c1689..e6e91a39 100644
--- a/src/workspaces/officerdev/src/locales/en-GB.json
+++ b/src/workspaces/officerdev/src/locales/en-GB.json
@@ -257,5 +257,63 @@
     "startHint": "It will look around this directory, then ask you what to watch for.",
     "startBlocked": "{{missing}} — then this starts it.",
     "confirmDeletingNamed": "Confirm deleting {{name}}"
+  },
+  "chatHistory": {
+    "newChat": "New Chat",
+    "tryAgain": "Try again",
+    "refresh": "Refresh",
+    "refreshSessions": "Refresh sessions",
+    "newChatInDir": "New chat in a directory…",
+    "loadFailed": "Could not load sessions",
+    "reading": "Reading transcripts…",
+    "noSessions": "No sessions yet",
+    "liveFailed": "Could not read live sessions",
+    "asking": "Asking the agent…",
+    "tabs": {
+      "tree": "Tree",
+      "latest": "Latest",
+      "live": "Live",
+      "agents": "Agents",
+      "commanders": "Commanders"
+    },
+    "notifyPreference": "Notification preference",
+    "notify": {
+      "everyTurn": "Every end of turn",
+      "inputNeeded": "Only when input is needed",
+      "none": "None"
+    },
+    "notificationsLabel": "Notifications: {{choice}}",
+    "chooseDir": "Choose a working directory",
+    "create": "Create",
+    "newFolder": "New folder",
+    "selectFolder": "Select this folder",
+    "newFolderName": "New folder name",
+    "noSubfolders": {
+      "one": "No visible subfolders — {{count}} hidden one is filtered out",
+      "other": "No visible subfolders — {{count}} hidden ones are filtered out"
+    },
+    "showHidden": "Show hidden",
+    "showHiddenCount": "Show hidden ({{count}})",
+    "selectSession": "Select a session to view",
+    "endSession": "End session — kills any running turn and releases it so it can be resumed elsewhere",
+    "noReadable": "No readable conversations here.",
+    "noConversations": "No conversations yet",
+    "newChatIn": "New chat in {{path}}",
+    "sessionTitle": "Session title",
+    "saveTitle": "Save title",
+    "cancelRename": "Cancel rename",
+    "confirmDelete": "Confirm delete",
+    "cancelDelete": "Cancel delete",
+    "rename": "Rename",
+    "deleteSession": "Delete session",
+    "renameFailed": "Could not rename the session: {{reason}}",
+    "deleteFailed": "Could not delete the session: {{reason}}",
+    "deleteAll": "Delete all {{count}}?",
+    "confirmDeletingNamed": "Confirm deleting {{name}}",
+    "renameNamed": "Rename {{name}}",
+    "deleteNamed": "Delete {{name}}",
+    "newChatTitle": "New chat",
+    "renameHint": "Click to rename this chat",
+    "hideHidden": "Hide hidden"
   }
 }
diff --git a/src/workspaces/officerdev/src/locales/pt-PT.json b/src/workspaces/officerdev/src/locales/pt-PT.json
index eb204e4c..68aec700 100644
--- a/src/workspaces/officerdev/src/locales/pt-PT.json
+++ b/src/workspaces/officerdev/src/locales/pt-PT.json
@@ -257,5 +257,63 @@
     "startHint": "Vai observar este diretório e depois perguntar-lhe o que deve vigiar.",
     "startBlocked": "{{missing}} — depois é isto que o inicia.",
     "confirmDeletingNamed": "Confirmar a eliminação de {{name}}"
+  },
+  "chatHistory": {
+    "newChat": "Novo chat",
+    "tryAgain": "Tentar novamente",
+    "refresh": "Atualizar",
+    "refreshSessions": "Atualizar sessões",
+    "newChatInDir": "Novo chat num diretório…",
+    "loadFailed": "Não foi possível carregar as sessões",
+    "reading": "A ler transcrições…",
+    "noSessions": "Ainda não há sessões",
+    "liveFailed": "Não foi possível ler as sessões ativas",
+    "asking": "A perguntar ao agente…",
+    "tabs": {
+      "tree": "Árvore",
+      "latest": "Recentes",
+      "live": "Ativas",
+      "agents": "Agentes",
+      "commanders": "Comandantes"
+    },
+    "notifyPreference": "Preferência de notificações",
+    "notify": {
+      "everyTurn": "Ao fim de cada turno",
+      "inputNeeded": "Apenas quando é preciso responder",
+      "none": "Nenhuma"
+    },
+    "notificationsLabel": "Notificações: {{choice}}",
+    "chooseDir": "Escolha um diretório de trabalho",
+    "create": "Criar",
+    "newFolder": "Nova pasta",
+    "selectFolder": "Selecionar esta pasta",
+    "newFolderName": "Nome da nova pasta",
+    "noSubfolders": {
+      "one": "Sem subpastas visíveis — {{count}} oculta foi filtrada",
+      "other": "Sem subpastas visíveis — {{count}} ocultas foram filtradas"
+    },
+    "showHidden": "Mostrar ocultas",
+    "showHiddenCount": "Mostrar ocultas ({{count}})",
+    "selectSession": "Selecione uma sessão para ver",
+    "endSession": "Terminar sessão — mata qualquer turno em execução e liberta-a para ser retomada noutro lugar",
+    "noReadable": "Não há conversas legíveis aqui.",
+    "noConversations": "Ainda não há conversas",
+    "newChatIn": "Novo chat em {{path}}",
+    "sessionTitle": "Título da sessão",
+    "saveTitle": "Guardar título",
+    "cancelRename": "Cancelar renomeação",
+    "confirmDelete": "Confirmar eliminação",
+    "cancelDelete": "Cancelar eliminação",
+    "rename": "Renomear",
+    "deleteSession": "Eliminar sessão",
+    "renameFailed": "Não foi possível renomear a sessão: {{reason}}",
+    "deleteFailed": "Não foi possível eliminar a sessão: {{reason}}",
+    "deleteAll": "Eliminar todas as {{count}}?",
+    "confirmDeletingNamed": "Confirmar a eliminação de {{name}}",
+    "renameNamed": "Renomear {{name}}",
+    "deleteNamed": "Eliminar {{name}}",
+    "newChatTitle": "Novo chat",
+    "renameHint": "Clique para renomear este chat",
+    "hideHidden": "Ocultar ocultas"
   }
 }