diff --git a/docs/plans/dm_calls_techdebt.md b/docs/plans/dm_calls_techdebt.md
index f5b691c0..e2c79180 100644
--- a/docs/plans/dm_calls_techdebt.md
+++ b/docs/plans/dm_calls_techdebt.md
@@ -577,3 +577,16 @@ App foreground, incoming DM call. JS strip + audio начинают отраба
 - **Capacitor sync risk:** confirmed safe — `cap sync` регенерит только `capacitor.build.gradle`, не трогает `build.gradle`.
 - **Связь:** follow-up §5.27 (landed 2026-04-24).
 
+### 5.50. 🟡 LeaveRoomPrompt / LeaveSpacePrompt prematurely report success
+
+- **Что:** [LeaveRoomPrompt.tsx](../../src/app/components/leave-room-prompt/LeaveRoomPrompt.tsx) и [LeaveSpacePrompt.tsx](../../src/app/components/leave-space-prompt/LeaveSpacePrompt.tsx) вызывают `mx.leave(roomId)` внутри `async` callback без `await`/`return`. `useAsyncCallback` ждёт callback, а не внутренний network promise, поэтому состояние становится `Success` сразу после запуска запроса.
+- **Симптом:** prompt закрывается через `onDone()` до ответа homeserver. Если `POST /rooms/{roomId}/leave` падает, ошибка не попадает в `leaveState`, `Failed to leave room/space` не показывается, возможен unhandled promise rejection, user остаётся в комнате после refresh/sync.
+- **Доказательство:** `matrix-js-sdk` `leave(roomId)` возвращает `Promise<EmptyObject>` и внутри делает `authedRequest(POST /rooms/$room_id/leave)`. Текущий callback возвращает `Promise<undefined>`, который resolve'ится сразу.
+- **Live reproduce:**
+  1. `npm run dev`, залогиниться и открыть joined room.
+  2. DevTools → Network throttling → `Offline` (или block request URL `*rooms/*/leave*`).
+  3. Room menu → `Leave Room` → confirm.
+  4. Фактический pre-fix результат: prompt закрывается как success, error text не появляется; в Network `POST .../rooms/{roomId}/leave` failed/blocked; после возврата online + refresh/sync комната остаётся.
+  5. Ожидаемый результат после фикса: prompt остаётся loading до ответа, затем показывает localized error.
+- **Фикс-направление:** `await mx.leave(roomId);` в обоих prompt'ах. Не `return mx.leave(roomId)`, если сохраняем `useAsyncCallback<undefined, MatrixError, []>` contract.
+- **Scope:** не связано с i18n-диффом; pre-existing bug, найден при ревью локализации leave prompt'а.
diff --git a/public/locales/en.json b/public/locales/en.json
index c42a4ed8..78183faf 100644
--- a/public/locales/en.json
+++ b/public/locales/en.json
@@ -390,7 +390,18 @@
     "incoming": "Incoming call…",
     "answer": "Answer",
     "decline": "Decline",
-    "unknown_caller": "Unknown caller"
+    "unknown_caller": "Unknown caller",
+    "mic_off": "Turn Off Microphone",
+    "mic_on": "Turn On Microphone",
+    "sound_off": "Turn Off Sound",
+    "sound_on": "Turn On Sound",
+    "camera_off": "Stop Camera",
+    "camera_on": "Start Camera",
+    "screenshare_off": "Stop Screenshare",
+    "screenshare_on": "Start Screenshare",
+    "chat_close": "Close Chat",
+    "chat_open": "Open Chat",
+    "end_call": "End"
   },
   "Room": {
     "new_messages": "New Messages",
@@ -476,7 +487,40 @@
     "not_decrypted_yet": "This message is not decrypted yet",
     "broken_message": "Broken message",
     "empty_message": "Empty message",
-    "edited": " (edited)"
+    "edited": " (edited)",
+
+    "conversation_beginning": "This is the beginning of conversation.",
+    "created_by": "Created by <bold>@{{creator}}</bold> on {{date}} {{time}}",
+    "invite_member": "Invite Member",
+    "open_old_room": "Open Old Room",
+    "join_old_room": "Join Old Room",
+    "leave_room_title": "Leave Room",
+    "leave_room_confirm": "Are you sure you want to leave this room?",
+    "leave_room_error": "Failed to leave room! {{error}}",
+    "leaving": "Leaving...",
+    "leave": "Leave",
+
+    "member_broken": "Broken membership event",
+    "member_accepted_knock": "<bold>{{sender}}</bold> accepted <bold>{{user}}</bold>'s join request",
+    "member_invited": "<bold>{{sender}}</bold> invited <bold>{{user}}</bold>",
+    "member_knock": "<bold>{{user}}</bold> requested to join room",
+    "member_joined": "<bold>{{user}}</bold> joined the room",
+    "member_rejected_invite": "<bold>{{user}}</bold> rejected the invitation",
+    "member_rejected_knock": "<bold>{{sender}}</bold> rejected <bold>{{user}}</bold>'s join request",
+    "member_revoked_knock": "<bold>{{user}}</bold> revoked join request",
+    "member_revoked_invite": "<bold>{{sender}}</bold> revoked <bold>{{user}}</bold>'s invite",
+    "member_unbanned": "<bold>{{sender}}</bold> unbanned <bold>{{user}}</bold>",
+    "member_left": "<bold>{{user}}</bold> left the room",
+    "member_kicked": "<bold>{{sender}}</bold> kicked <bold>{{user}}</bold>",
+    "member_banned": "<bold>{{sender}}</bold> banned <bold>{{user}}</bold>",
+    "member_name_changed": "<bold>{{oldName}}</bold> changed display name to <bold>{{newName}}</bold>",
+    "member_name_removed": "<bold>{{user}}</bold> removed their display name",
+    "member_avatar_changed": "<bold>{{user}}</bold> changed their avatar",
+    "member_avatar_removed": "<bold>{{user}}</bold> removed their avatar",
+    "member_no_change": "Membership event with no changes",
+
+    "member_ended_call": "<bold>{{user}}</bold> ended the call",
+    "member_joined_call": "<bold>{{user}}</bold> joined the call"
   },
   "Inbox": {
     "inbox": "Inbox",
diff --git a/public/locales/ru.json b/public/locales/ru.json
index b2f4924c..759dcd33 100644
--- a/public/locales/ru.json
+++ b/public/locales/ru.json
@@ -390,7 +390,18 @@
     "incoming": "Входящий звонок…",
     "answer": "Ответить",
     "decline": "Отклонить",
-    "unknown_caller": "Неизвестный абонент"
+    "unknown_caller": "Неизвестный абонент",
+    "mic_off": "Выключить микрофон",
+    "mic_on": "Включить микрофон",
+    "sound_off": "Выключить звук",
+    "sound_on": "Включить звук",
+    "camera_off": "Выключить камеру",
+    "camera_on": "Включить камеру",
+    "screenshare_off": "Остановить показ экрана",
+    "screenshare_on": "Начать показ экрана",
+    "chat_close": "Закрыть чат",
+    "chat_open": "Открыть чат",
+    "end_call": "Завершить"
   },
   "Room": {
     "new_messages": "Новые сообщения",
@@ -476,7 +487,40 @@
     "not_decrypted_yet": "Сообщение ещё не расшифровано",
     "broken_message": "Повреждённое сообщение",
     "empty_message": "Пустое сообщение",
-    "edited": " (изменено)"
+    "edited": " (изменено)",
+
+    "conversation_beginning": "Начало переписки.",
+    "created_by": "Комната создана <bold>@{{creator}}</bold> {{date}} {{time}}",
+    "invite_member": "Пригласить",
+    "open_old_room": "Открыть старую комнату",
+    "join_old_room": "Войти в старую комнату",
+    "leave_room_title": "Покинуть комнату",
+    "leave_room_confirm": "Покинуть эту комнату?",
+    "leave_room_error": "Не удалось покинуть комнату! {{error}}",
+    "leaving": "Выход...",
+    "leave": "Покинуть",
+
+    "member_broken": "Некорректное событие участия",
+    "member_accepted_knock": "<bold>{{sender}}</bold> одобряет вступление <bold>{{user}}</bold>",
+    "member_invited": "<bold>{{sender}}</bold> приглашает <bold>{{user}}</bold>",
+    "member_knock": "<bold>{{user}}</bold> просит вступить в комнату",
+    "member_joined": "<bold>{{user}}</bold> теперь в комнате",
+    "member_rejected_invite": "<bold>{{user}}</bold> отклоняет приглашение",
+    "member_rejected_knock": "<bold>{{sender}}</bold> отклоняет запрос <bold>{{user}}</bold>",
+    "member_revoked_knock": "<bold>{{user}}</bold> отзывает запрос на вступление",
+    "member_revoked_invite": "<bold>{{sender}}</bold> отзывает приглашение <bold>{{user}}</bold>",
+    "member_unbanned": "<bold>{{sender}}</bold> разблокирует <bold>{{user}}</bold>",
+    "member_left": "<bold>{{user}}</bold> больше не в комнате",
+    "member_kicked": "<bold>{{sender}}</bold> исключает <bold>{{user}}</bold>",
+    "member_banned": "<bold>{{sender}}</bold> блокирует <bold>{{user}}</bold>",
+    "member_name_changed": "<bold>{{oldName}}</bold> теперь <bold>{{newName}}</bold>",
+    "member_name_removed": "<bold>{{user}}</bold> убирает отображаемое имя",
+    "member_avatar_changed": "<bold>{{user}}</bold> меняет аватар",
+    "member_avatar_removed": "<bold>{{user}}</bold> убирает аватар",
+    "member_no_change": "Событие участия без изменений",
+
+    "member_ended_call": "<bold>{{user}}</bold> больше не в звонке",
+    "member_joined_call": "<bold>{{user}}</bold> теперь в звонке"
   },
   "Inbox": {
     "inbox": "Входящие",
diff --git a/src/app/components/leave-room-prompt/LeaveRoomPrompt.tsx b/src/app/components/leave-room-prompt/LeaveRoomPrompt.tsx
index 217491e6..aaa383c7 100644
--- a/src/app/components/leave-room-prompt/LeaveRoomPrompt.tsx
+++ b/src/app/components/leave-room-prompt/LeaveRoomPrompt.tsx
@@ -17,6 +17,7 @@ import {
   Spinner,
 } from 'folds';
 import { MatrixError } from 'matrix-js-sdk';
+import { useTranslation } from 'react-i18next';
 import { useMatrixClient } from '../../hooks/useMatrixClient';
 import { AsyncStatus, useAsyncCallback } from '../../hooks/useAsyncCallback';
 import { stopPropagation } from '../../utils/keyboard';
@@ -27,6 +28,7 @@ type LeaveRoomPromptProps = {
   onCancel: () => void;
 };
 export function LeaveRoomPrompt({ roomId, onDone, onCancel }: LeaveRoomPromptProps) {
+  const { t } = useTranslation();
   const mx = useMatrixClient();
 
   const [leaveState, leaveRoom] = useAsyncCallback<undefined, MatrixError, []>(
@@ -66,7 +68,7 @@ export function LeaveRoomPrompt({ roomId, onDone, onCancel }: LeaveRoomPromptPro
               size="500"
             >
               <Box grow="Yes">
-                <Text size="H4">Leave Room</Text>
+                <Text size="H4">{t('Room.leave_room_title')}</Text>
               </Box>
               <IconButton size="300" onClick={onCancel} radii="300">
                 <Icon src={Icons.Cross} />
@@ -74,10 +76,10 @@ export function LeaveRoomPrompt({ roomId, onDone, onCancel }: LeaveRoomPromptPro
             </Header>
             <Box style={{ padding: config.space.S400 }} direction="Column" gap="400">
               <Box direction="Column" gap="200">
-                <Text priority="400">Are you sure you want to leave this room?</Text>
+                <Text priority="400">{t('Room.leave_room_confirm')}</Text>
                 {leaveState.status === AsyncStatus.Error && (
                   <Text style={{ color: color.Critical.Main }} size="T300">
-                    Failed to leave room! {leaveState.error.message}
+                    {t('Room.leave_room_error', { error: leaveState.error.message })}
                   </Text>
                 )}
               </Box>
@@ -96,7 +98,7 @@ export function LeaveRoomPrompt({ roomId, onDone, onCancel }: LeaveRoomPromptPro
                 }
               >
                 <Text size="B400">
-                  {leaveState.status === AsyncStatus.Loading ? 'Leaving...' : 'Leave'}
+                  {leaveState.status === AsyncStatus.Loading ? t('Room.leaving') : t('Room.leave')}
                 </Text>
               </Button>
             </Box>
diff --git a/src/app/components/room-intro/RoomIntro.tsx b/src/app/components/room-intro/RoomIntro.tsx
index ce550992..4a1d319f 100644
--- a/src/app/components/room-intro/RoomIntro.tsx
+++ b/src/app/components/room-intro/RoomIntro.tsx
@@ -2,6 +2,7 @@ import React, { useCallback, useState } from 'react';
 import { Avatar, Box, Button, Spinner, Text, as } from 'folds';
 import { Room } from 'matrix-js-sdk';
 import { useAtomValue } from 'jotai';
+import { Trans, useTranslation } from 'react-i18next';
 import { IRoomCreateContent, Membership, StateEvent } from '../../../types/matrix/room';
 import { getMemberDisplayName, getStateEvent } from '../../utils/room';
 import { useMatrixClient } from '../../hooks/useMatrixClient';
@@ -23,6 +24,7 @@ export type RoomIntroProps = {
 };
 
 export const RoomIntro = as<'div', RoomIntroProps>(({ room, ...props }, ref) => {
+  const { t } = useTranslation();
   const mx = useMatrixClient();
   const useAuthentication = useMediaAuthentication();
   const { navigateRoom } = useRoomNavigate();
@@ -66,19 +68,21 @@ export const RoomIntro = as<'div', RoomIntroProps>(({ room, ...props }, ref) =>
             {name}
           </Text>
           <Text size="T400" priority="400">
-            {typeof topic === 'string' ? topic : 'This is the beginning of conversation.'}
+            {typeof topic === 'string' ? topic : t('Room.conversation_beginning')}
           </Text>
           {creatorName && ts && (
             <Text size="T200" priority="300">
-              {'Created by '}
-              <b>@{creatorName}</b>
-              {` on ${timeDayMonthYear(ts)} ${timeHourMinute(ts, hour24Clock)}`}
+              <Trans
+                i18nKey="Room.created_by"
+                values={{ creator: creatorName, date: timeDayMonthYear(ts), time: timeHourMinute(ts, hour24Clock) }}
+                components={{ bold: <b /> }}
+              />
             </Text>
           )}
         </Box>
         <Box gap="200" wrap="Wrap">
           <Button onClick={() => setInvitePrompt(true)} variant="Secondary" size="300" radii="300">
-            <Text size="B300">Invite Member</Text>
+            <Text size="B300">{t('Room.invite_member')}</Text>
           </Button>
 
           {invitePrompt && (
@@ -93,7 +97,7 @@ export const RoomIntro = as<'div', RoomIntroProps>(({ room, ...props }, ref) =>
                 fill="Soft"
                 radii="300"
               >
-                <Text size="B300">Open Old Room</Text>
+                <Text size="B300">{t('Room.open_old_room')}</Text>
               </Button>
             ) : (
               <Button
@@ -109,7 +113,7 @@ export const RoomIntro = as<'div', RoomIntroProps>(({ room, ...props }, ref) =>
                   ) : undefined
                 }
               >
-                <Text size="B300">Join Old Room</Text>
+                <Text size="B300">{t('Room.join_old_room')}</Text>
               </Button>
             ))}
         </Box>
diff --git a/src/app/features/call-status/CallControl.tsx b/src/app/features/call-status/CallControl.tsx
index dc8cb6c4..9d1502fd 100644
--- a/src/app/features/call-status/CallControl.tsx
+++ b/src/app/features/call-status/CallControl.tsx
@@ -1,6 +1,7 @@
 import { Box, Chip, Icon, IconButton, Icons, Spinner, Text, Tooltip, TooltipProvider } from 'folds';
 import React, { useCallback } from 'react';
 import { useSetAtom, useStore } from 'jotai';
+import { useTranslation } from 'react-i18next';
 import { StatusDivider } from './components';
 import { CallEmbed, useCallControlState } from '../../plugins/call';
 import { AsyncStatus, useAsyncCallback } from '../../hooks/useAsyncCallback';
@@ -20,12 +21,13 @@ type MicrophoneButtonProps = {
   disabled?: boolean;
 };
 function MicrophoneButton({ enabled, onToggle, disabled }: MicrophoneButtonProps) {
+  const { t } = useTranslation();
   return (
     <TooltipProvider
       position="Top"
       tooltip={
         <Tooltip>
-          <Text size="T200">{enabled ? 'Turn Off Microphone' : 'Turn On Microphone'}</Text>
+          <Text size="T200">{enabled ? t('Call.mic_off') : t('Call.mic_on')}</Text>
         </Tooltip>
       }
     >
@@ -53,12 +55,13 @@ type SoundButtonProps = {
   disabled?: boolean;
 };
 function SoundButton({ enabled, onToggle, disabled }: SoundButtonProps) {
+  const { t } = useTranslation();
   return (
     <TooltipProvider
       position="Top"
       tooltip={
         <Tooltip>
-          <Text size="T200">{enabled ? 'Turn Off Sound' : 'Turn On Sound'}</Text>
+          <Text size="T200">{enabled ? t('Call.sound_off') : t('Call.sound_on')}</Text>
         </Tooltip>
       }
     >
@@ -90,12 +93,13 @@ type VideoButtonProps = {
   disabled?: boolean;
 };
 function VideoButton({ enabled, onToggle, disabled }: VideoButtonProps) {
+  const { t } = useTranslation();
   return (
     <TooltipProvider
       position="Top"
       tooltip={
         <Tooltip>
-          <Text size="T200">{enabled ? 'Stop Camera' : 'Start Camera'}</Text>
+          <Text size="T200">{enabled ? t('Call.camera_off') : t('Call.camera_on')}</Text>
         </Tooltip>
       }
     >
@@ -127,12 +131,13 @@ type ScreenShareButtonProps = {
   disabled?: boolean;
 };
 function ScreenShareButton({ enabled, onToggle, disabled }: ScreenShareButtonProps) {
+  const { t } = useTranslation();
   return (
     <TooltipProvider
       position="Top"
       tooltip={
         <Tooltip>
-          <Text size="T200">{enabled ? 'Stop Screenshare' : 'Start Screenshare'}</Text>
+          <Text size="T200">{enabled ? t('Call.screenshare_off') : t('Call.screenshare_on')}</Text>
         </Tooltip>
       }
     >
@@ -163,6 +168,7 @@ export function CallControl({
   compact: boolean;
   callJoined: boolean;
 }) {
+  const { t } = useTranslation();
   const { microphone, video, sound, screenshare } = useCallControlState(callEmbed.control);
   const setCallEmbed = useSetAtom(callEmbedAtom);
   const store = useStore();
@@ -250,7 +256,7 @@ export function CallControl({
       >
         {!compact && (
           <Text as="span" size="L400">
-            End
+            {t('Call.end_call')}
           </Text>
         )}
       </Chip>
diff --git a/src/app/features/call/Controls.tsx b/src/app/features/call/Controls.tsx
index 143a8022..9a7639b8 100644
--- a/src/app/features/call/Controls.tsx
+++ b/src/app/features/call/Controls.tsx
@@ -1,6 +1,7 @@
 import React from 'react';
 import { Icon, IconButton, Icons, Line, Text, Tooltip, TooltipProvider } from 'folds';
 import { useAtom } from 'jotai';
+import { useTranslation } from 'react-i18next';
 import * as css from './styles.css';
 import { callChatAtom } from '../../state/callEmbed';
 
@@ -15,13 +16,14 @@ type MicrophoneButtonProps = {
   onToggle: () => void;
 };
 export function MicrophoneButton({ enabled, onToggle }: MicrophoneButtonProps) {
+  const { t } = useTranslation();
   return (
     <TooltipProvider
       position="Top"
       delay={500}
       tooltip={
         <Tooltip>
-          <Text size="T200">{enabled ? 'Turn Off Microphone' : 'Turn On Microphone'}</Text>
+          <Text size="T200">{enabled ? t('Call.mic_off') : t('Call.mic_on')}</Text>
         </Tooltip>
       }
     >
@@ -47,13 +49,14 @@ type SoundButtonProps = {
   onToggle: () => void;
 };
 export function SoundButton({ enabled, onToggle }: SoundButtonProps) {
+  const { t } = useTranslation();
   return (
     <TooltipProvider
       position="Top"
       delay={500}
       tooltip={
         <Tooltip>
-          <Text size="T200">{enabled ? 'Turn Off Sound' : 'Turn On Sound'}</Text>
+          <Text size="T200">{enabled ? t('Call.sound_off') : t('Call.sound_on')}</Text>
         </Tooltip>
       }
     >
@@ -83,13 +86,14 @@ type VideoButtonProps = {
   onToggle: () => void;
 };
 export function VideoButton({ enabled, onToggle }: VideoButtonProps) {
+  const { t } = useTranslation();
   return (
     <TooltipProvider
       position="Top"
       delay={500}
       tooltip={
         <Tooltip>
-          <Text size="T200">{enabled ? 'Stop Camera' : 'Start Camera'}</Text>
+          <Text size="T200">{enabled ? t('Call.camera_off') : t('Call.camera_on')}</Text>
         </Tooltip>
       }
     >
@@ -119,13 +123,14 @@ type ScreenShareButtonProps = {
   onToggle: () => void;
 };
 export function ScreenShareButton({ enabled, onToggle }: ScreenShareButtonProps) {
+  const { t } = useTranslation();
   return (
     <TooltipProvider
       position="Top"
       delay={500}
       tooltip={
         <Tooltip>
-          <Text size="T200">{enabled ? 'Stop Screenshare' : 'Start Screenshare'}</Text>
+          <Text size="T200">{enabled ? t('Call.screenshare_off') : t('Call.screenshare_on')}</Text>
         </Tooltip>
       }
     >
@@ -147,6 +152,7 @@ export function ScreenShareButton({ enabled, onToggle }: ScreenShareButtonProps)
 }
 
 export function ChatButton() {
+  const { t } = useTranslation();
   const [chat, setChat] = useAtom(callChatAtom);
 
   return (
@@ -155,7 +161,7 @@ export function ChatButton() {
       delay={500}
       tooltip={
         <Tooltip>
-          <Text size="T200">{chat ? 'Close Chat' : 'Open Chat'}</Text>
+          <Text size="T200">{chat ? t('Call.chat_close') : t('Call.chat_open')}</Text>
         </Tooltip>
       }
     >
diff --git a/src/app/features/room/RoomTimeline.tsx b/src/app/features/room/RoomTimeline.tsx
index faee8340..e44fba6a 100644
--- a/src/app/features/room/RoomTimeline.tsx
+++ b/src/app/features/room/RoomTimeline.tsx
@@ -47,7 +47,7 @@ import {
 } from 'folds';
 import { isKeyHotkey } from 'is-hotkey';
 import { Opts as LinkifyOpts } from 'linkifyjs';
-import { useTranslation } from 'react-i18next';
+import { Trans, useTranslation } from 'react-i18next';
 import { eventWithShortcode, factoryEventSentBy, getMxIdLocalPart } from '../../utils/matrix';
 import { useMatrixClient } from '../../hooks/useMatrixClient';
 import { useVirtualPaginator, ItemRange } from '../../hooks/useVirtualPaginator';
@@ -1534,8 +1534,11 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
               content={
                 <Box grow="Yes" direction="Column">
                   <Text size="T300" priority="300">
-                    <b>{senderName}</b>
-                    {callJoined ? ' joined the call' : ' ended the call'}
+                    <Trans
+                      i18nKey={callJoined ? 'Room.member_joined_call' : 'Room.member_ended_call'}
+                      values={{ user: senderName }}
+                      components={{ bold: <b /> }}
+                    />
                   </Text>
                 </Box>
               }
diff --git a/src/app/hooks/useMemberEventParser.tsx b/src/app/hooks/useMemberEventParser.tsx
index 8a59aaad..a2280296 100644
--- a/src/app/hooks/useMemberEventParser.tsx
+++ b/src/app/hooks/useMemberEventParser.tsx
@@ -1,6 +1,7 @@
 import React, { ReactNode } from 'react';
 import { IconSrc, Icons } from 'folds';
 import { MatrixEvent } from 'matrix-js-sdk';
+import { Trans } from 'react-i18next';
 import { IMemberContent, Membership } from '../../types/matrix/room';
 import { getMxIdLocalPart } from '../utils/matrix';
 import { isMembershipChanged } from '../utils/room';
@@ -12,6 +13,8 @@ export type ParsedResult = {
 
 export type MemberEventParser = (mEvent: MatrixEvent) => ParsedResult;
 
+const B = <b />;
+
 export const useMemberEventParser = (): MemberEventParser => {
   const parseMemberEvent: MemberEventParser = (mEvent) => {
     const content = mEvent.getContent<IMemberContent>();
@@ -23,7 +26,7 @@ export const useMemberEventParser = (): MemberEventParser => {
     if (!senderId || !userId)
       return {
         icon: Icons.User,
-        body: 'Broken membership event',
+        body: <Trans i18nKey="Room.member_broken" />,
       };
 
     const senderName = getMxIdLocalPart(senderId);
@@ -39,11 +42,12 @@ export const useMemberEventParser = (): MemberEventParser => {
             icon: Icons.ArrowGoRightPlus,
             body: (
               <>
-                <b>{senderName}</b>
-                {' accepted '}
-                <b>{userName}</b>
-                {`'s join request `}
-                {reason}
+                <Trans
+                  i18nKey="Room.member_accepted_knock"
+                  values={{ sender: senderName, user: userName }}
+                  components={{ bold: B }}
+                />
+                {reason ? ` ${reason}` : ''}
               </>
             ),
           };
@@ -53,9 +57,12 @@ export const useMemberEventParser = (): MemberEventParser => {
           icon: Icons.ArrowGoRightPlus,
           body: (
             <>
-              <b>{senderName}</b>
-              {' invited '}
-              <b>{userName}</b> {reason}
+              <Trans
+                i18nKey="Room.member_invited"
+                values={{ sender: senderName, user: userName }}
+                components={{ bold: B }}
+              />
+              {reason ? ` ${reason}` : ''}
             </>
           ),
         };
@@ -66,9 +73,12 @@ export const useMemberEventParser = (): MemberEventParser => {
           icon: Icons.ArrowGoRightPlus,
           body: (
             <>
-              <b>{userName}</b>
-              {' request to join room '}
-              {reason}
+              <Trans
+                i18nKey="Room.member_knock"
+                values={{ user: userName }}
+                components={{ bold: B }}
+              />
+              {reason ? ` ${reason}` : ''}
             </>
           ),
         };
@@ -78,10 +88,11 @@ export const useMemberEventParser = (): MemberEventParser => {
         return {
           icon: Icons.ArrowGoRight,
           body: (
-            <>
-              <b>{userName}</b>
-              {' joined the room'}
-            </>
+            <Trans
+              i18nKey="Room.member_joined"
+              values={{ user: userName }}
+              components={{ bold: B }}
+            />
           ),
         };
       }
@@ -93,17 +104,21 @@ export const useMemberEventParser = (): MemberEventParser => {
             body:
               senderId === userId ? (
                 <>
-                  <b>{userName}</b>
-                  {' rejected the invitation '}
-                  {reason}
+                  <Trans
+                    i18nKey="Room.member_rejected_invite"
+                    values={{ user: userName }}
+                    components={{ bold: B }}
+                  />
+                  {reason ? ` ${reason}` : ''}
                 </>
               ) : (
                 <>
-                  <b>{senderName}</b>
-                  {' rejected '}
-                  <b>{userName}</b>
-                  {`'s join request `}
-                  {reason}
+                  <Trans
+                    i18nKey="Room.member_rejected_knock"
+                    values={{ sender: senderName, user: userName }}
+                    components={{ bold: B }}
+                  />
+                  {reason ? ` ${reason}` : ''}
                 </>
               ),
           };
@@ -115,17 +130,21 @@ export const useMemberEventParser = (): MemberEventParser => {
             body:
               senderId === userId ? (
                 <>
-                  <b>{userName}</b>
-                  {' revoked joined request '}
-                  {reason}
+                  <Trans
+                    i18nKey="Room.member_revoked_knock"
+                    values={{ user: userName }}
+                    components={{ bold: B }}
+                  />
+                  {reason ? ` ${reason}` : ''}
                 </>
               ) : (
                 <>
-                  <b>{senderName}</b>
-                  {' revoked '}
-                  <b>{userName}</b>
-                  {`'s invite `}
-                  {reason}
+                  <Trans
+                    i18nKey="Room.member_revoked_invite"
+                    values={{ sender: senderName, user: userName }}
+                    components={{ bold: B }}
+                  />
+                  {reason ? ` ${reason}` : ''}
                 </>
               ),
           };
@@ -136,9 +155,12 @@ export const useMemberEventParser = (): MemberEventParser => {
             icon: Icons.ArrowGoLeft,
             body: (
               <>
-                <b>{senderName}</b>
-                {' unbanned '}
-                <b>{userName}</b> {reason}
+                <Trans
+                  i18nKey="Room.member_unbanned"
+                  values={{ sender: senderName, user: userName }}
+                  components={{ bold: B }}
+                />
+                {reason ? ` ${reason}` : ''}
               </>
             ),
           };
@@ -149,15 +171,21 @@ export const useMemberEventParser = (): MemberEventParser => {
           body:
             senderId === userId ? (
               <>
-                <b>{userName}</b>
-                {' left the room '}
-                {reason}
+                <Trans
+                  i18nKey="Room.member_left"
+                  values={{ user: userName }}
+                  components={{ bold: B }}
+                />
+                {reason ? ` ${reason}` : ''}
               </>
             ) : (
               <>
-                <b>{senderName}</b>
-                {' kicked '}
-                <b>{userName}</b> {reason}
+                <Trans
+                  i18nKey="Room.member_kicked"
+                  values={{ sender: senderName, user: userName }}
+                  components={{ bold: B }}
+                />
+                {reason ? ` ${reason}` : ''}
               </>
             ),
         };
@@ -168,9 +196,12 @@ export const useMemberEventParser = (): MemberEventParser => {
           icon: Icons.ArrowGoLeft,
           body: (
             <>
-              <b>{senderName}</b>
-              {' banned '}
-              <b>{userName}</b> {reason}
+              <Trans
+                i18nKey="Room.member_banned"
+                values={{ sender: senderName, user: userName }}
+                components={{ bold: B }}
+              />
+              {reason ? ` ${reason}` : ''}
             </>
           ),
         };
@@ -187,16 +218,17 @@ export const useMemberEventParser = (): MemberEventParser => {
         icon: Icons.Mention,
         body:
           typeof content.displayname === 'string' ? (
-            <>
-              <b>{prevUserName}</b>
-              {' changed display name to '}
-              <b>{userName}</b>
-            </>
+            <Trans
+              i18nKey="Room.member_name_changed"
+              values={{ oldName: prevUserName, newName: userName }}
+              components={{ bold: B }}
+            />
           ) : (
-            <>
-              <b>{prevUserName}</b>
-              {' removed their display name '}
-            </>
+            <Trans
+              i18nKey="Room.member_name_removed"
+              values={{ user: prevUserName }}
+              components={{ bold: B }}
+            />
           ),
       };
     }
@@ -205,22 +237,24 @@ export const useMemberEventParser = (): MemberEventParser => {
         icon: Icons.User,
         body:
           content.avatar_url && typeof content.avatar_url === 'string' ? (
-            <>
-              <b>{userName}</b>
-              {' changed their avatar'}
-            </>
+            <Trans
+              i18nKey="Room.member_avatar_changed"
+              values={{ user: userName }}
+              components={{ bold: B }}
+            />
           ) : (
-            <>
-              <b>{userName}</b>
-              {' removed their avatar '}
-            </>
+            <Trans
+              i18nKey="Room.member_avatar_removed"
+              values={{ user: userName }}
+              components={{ bold: B }}
+            />
           ),
       };
     }
 
     return {
       icon: Icons.User,
-      body: 'Membership event with no changes',
+      body: <Trans i18nKey="Room.member_no_change" />,
     };
   };