diff --git a/frontend/src/lib/components/sidebar/OperatorMenu.svelte b/frontend/src/lib/components/sidebar/OperatorMenu.svelte
index 2b916550ff..5f55f1ad0f 100644
--- a/frontend/src/lib/components/sidebar/OperatorMenu.svelte
+++ b/frontend/src/lib/components/sidebar/OperatorMenu.svelte
@@ -38,6 +38,7 @@
 	import MenuButton, { sidebarClasses } from './MenuButton.svelte'
 	import MenuLink from './MenuLink.svelte'
 	import type { FavoriteKind } from './FavoriteMenu.svelte'
+	import { t } from '$lib/i18n/t.svelte'
 	let darkMode: boolean = $state(false)
 	let showExtraTriggers = $state(false)
 	let menubarEl: HTMLElement | undefined = $state()
@@ -55,14 +56,14 @@
 
 	let mainMenuLinks = $derived(
 		[
-			{ label: 'Home', id: 'home', href: `${base}/`, icon: Home },
-			{ label: 'Runs', id: 'runs', href: `${base}/runs`, icon: Play },
-			{ label: 'Schedules', id: 'schedules', href: `${base}/schedules`, icon: Calendar },
+			{ label: t('sidebar.home'), id: 'home', href: `${base}/`, icon: Home },
+			{ label: t('sidebar.runs'), id: 'runs', href: `${base}/runs`, icon: Play },
+			{ label: t('sidebar.schedules'), id: 'schedules', href: `${base}/schedules`, icon: Calendar },
 			// Add Tutorials to main menu only if not all completed and not skipped
 			...($tutorialsToDo.length > 0 && !$skippedAll
 				? [
 						{
-							label: 'Tutorials',
+							label: t('sidebar.tutorials'),
 							id: 'tutorials',
 							href: `${base}/tutorials`,
 							icon: GraduationCap
@@ -89,37 +90,37 @@
 	let secondMenuLinks: SecondMenuLink[] = $derived(
 		[
 			{
-				label: 'Resources',
+				label: t('sidebar.resources'),
 				id: 'resources',
 				href: `${base}/resources`
 			},
 			{
-				label: 'Variables',
+				label: t('sidebar.variables'),
 				id: 'variables',
 				href: `${base}/variables`
 			},
 			{
-				label: 'Assets',
+				label: t('sidebar.assets'),
 				id: 'assets',
 				href: `${base}/assets`
 			},
 			{
-				label: 'Groups',
+				label: t('sidebar.groups'),
 				id: 'groups',
 				href: `${base}/groups`
 			},
 			{
-				label: 'Folders',
+				label: t('sidebar.folders'),
 				id: 'folders',
 				href: `${base}/folders`
 			},
 			{
-				label: 'Workers',
+				label: t('sidebar.workers'),
 				id: 'workers',
 				href: `${base}/workers`
 			},
 			{
-				label: 'Audit logs',
+				label: t('sidebar.audit_logs'),
 				id: 'audit_logs',
 				href: `${base}/audit_logs`
 			}
@@ -129,30 +130,60 @@
 	let allTriggerLinks: TriggerMenuLink[] = $derived(
 		(
 			[
-				{ label: 'Custom HTTP routes', id: 'triggers', href: `${base}/routes`, kind: 'http' },
 				{
-					label: 'Websocket triggers',
+					label: t('operator.custom_http_routes'),
+					id: 'triggers',
+					href: `${base}/routes`,
+					kind: 'http'
+				},
+				{
+					label: t('operator.websocket_triggers'),
 					id: 'triggers',
 					href: `${base}/websocket_triggers`,
 					kind: 'ws'
 				},
 				{
-					label: 'Postgres triggers',
+					label: t('operator.postgres_triggers'),
 					id: 'triggers',
 					href: `${base}/postgres_triggers`,
 					kind: 'postgres'
 				},
-				{ label: 'Kafka triggers', id: 'triggers', href: `${base}/kafka_triggers`, kind: 'kafka' },
-				{ label: 'NATS triggers', id: 'triggers', href: `${base}/nats_triggers`, kind: 'nats' },
-				{ label: 'SQS triggers', id: 'triggers', href: `${base}/sqs_triggers`, kind: 'sqs' },
 				{
-					label: 'GCP Pub/Sub triggers',
+					label: t('operator.kafka_triggers'),
+					id: 'triggers',
+					href: `${base}/kafka_triggers`,
+					kind: 'kafka'
+				},
+				{
+					label: t('operator.nats_triggers'),
+					id: 'triggers',
+					href: `${base}/nats_triggers`,
+					kind: 'nats'
+				},
+				{
+					label: t('operator.sqs_triggers'),
+					id: 'triggers',
+					href: `${base}/sqs_triggers`,
+					kind: 'sqs'
+				},
+				{
+					label: t('operator.gcp_triggers'),
 					id: 'triggers',
 					href: `${base}/gcp_triggers`,
 					kind: 'gcp'
 				},
-				{ label: 'MQTT triggers', id: 'triggers', href: `${base}/mqtt_triggers`, kind: 'mqtt' },
-				{ label: 'Email triggers', id: 'triggers', href: `${base}/email_triggers`, kind: 'email' }
+				{
+					label: t('operator.mqtt_triggers'),
+					id: 'triggers',
+					href: `${base}/mqtt_triggers`,
+					kind: 'mqtt'
+				},
+				{
+					label: t('operator.email_triggers'),
+					id: 'triggers',
+					href: `${base}/email_triggers`,
+					kind: 'email'
+				}
 			] as TriggerMenuLink[]
 		).filter(filterLink)
 	)
@@ -231,7 +262,7 @@
 								{item}
 							>
 								<Settings size={14} />
-								Account settings
+								{t('user.account_settings')}
 							</MenuItem>
 						</div>
 
@@ -259,7 +290,7 @@
 								{:else}
 									<Moon size={14} />
 								{/if}
-								Switch theme
+								{t('user.switch_theme')}
 							</MenuItem>
 							<MenuItem
 								href="{base}/user/workspaces"
@@ -288,7 +319,7 @@
 									{item}
 								>
 									<ServerCog size={14} />
-									Instance settings
+									{t('sidebar.instance')}
 								</MenuItem>
 							{/if}
 
@@ -303,7 +334,7 @@
 								{item}
 							>
 								<LogOut size={14} />
-								Sign out
+								{t('user.sign_out')}
 							</MenuItem>
 						</div>
 						<div role="none">
diff --git a/frontend/src/lib/components/sidebar/SidebarContent.svelte b/frontend/src/lib/components/sidebar/SidebarContent.svelte
index b0382158bf..ff85b719c3 100644
--- a/frontend/src/lib/components/sidebar/SidebarContent.svelte
+++ b/frontend/src/lib/components/sidebar/SidebarContent.svelte
@@ -73,6 +73,7 @@
 	} from '$lib/components/meltComponents'
 	import MenuButton from './MenuButton.svelte'
 	import GoogleCloudIcon from '../icons/GoogleCloudIcon.svelte'
+	import { t } from '$lib/i18n/t.svelte'
 
 	async function leaveWorkspace() {
 		await WorkspaceService.leaveWorkspace({ workspace: $workspaceStore ?? '' })
@@ -133,13 +134,13 @@
 		hasNewChangelogs = false
 	}
 
-	const thirdMenuLinks = [
+	let thirdMenuLinks = $derived([
 		{
-			label: 'Help',
+			label: t('sidebar.help'),
 			icon: HelpCircle,
 			subItems: [
 				{
-					label: 'Tutorials',
+					label: t('sidebar.tutorials'),
 					href: `${base}/tutorials`,
 					icon: GraduationCap,
 					aiId: 'sidebar-menu-link-tutorials',
@@ -147,7 +148,7 @@
 					external: false
 				},
 				{
-					label: 'Docs',
+					label: t('sidebar.docs'),
 					href: 'https://www.windmill.dev/docs/intro/',
 					icon: BookOpen,
 					aiId: 'sidebar-menu-link-docs',
@@ -155,7 +156,7 @@
 					external: true
 				},
 				{
-					label: 'Feedbacks',
+					label: t('sidebar.feedbacks'),
 					href: 'https://discord.gg/V7PM2YHsPB',
 					icon: DiscordIcon,
 					aiId: 'sidebar-menu-link-feedbacks',
@@ -163,7 +164,7 @@
 					external: true
 				},
 				{
-					label: 'Issues',
+					label: t('sidebar.issues'),
 					href: 'https://github.com/windmill-labs/windmill/issues/new',
 					icon: Github,
 					aiId: 'sidebar-menu-link-issues',
@@ -171,7 +172,7 @@
 					external: true
 				},
 				{
-					label: 'Changelog',
+					label: t('sidebar.changelog'),
 					href: 'https://www.windmill.dev/changelog/',
 					icon: Newspaper,
 					aiId: 'sidebar-menu-link-changelog',
@@ -180,7 +181,7 @@
 				}
 			]
 		}
-	]
+	])
 
 	interface Props {
 		numUnacknowledgedCriticalAlerts?: number
@@ -205,7 +206,7 @@
 	)
 	let mainMenuLinks = $derived([
 		{
-			label: 'Home',
+			label: t('sidebar.home'),
 			href: `${base}/`,
 			icon: Home,
 			aiId: 'sidebar-menu-link-home',
@@ -213,7 +214,7 @@
 				"Button to navigate to home which contains all the user's scripts, flows and apps"
 		},
 		{
-			label: 'Runs',
+			label: t('sidebar.runs'),
 			href: `${base}/runs`,
 			icon: Play,
 			aiId: 'sidebar-menu-link-runs',
@@ -225,7 +226,7 @@
 			}
 		},
 		{
-			label: 'Variables',
+			label: t('sidebar.variables'),
 			href: `${base}/variables`,
 			icon: DollarSign,
 			disabled: $userStore?.operator,
@@ -233,7 +234,7 @@
 			aiDescription: 'Button to navigate to variables'
 		},
 		{
-			label: 'Resources',
+			label: t('sidebar.resources'),
 			href: `${base}/resources`,
 			icon: Boxes,
 			disabled: $userStore?.operator,
@@ -241,7 +242,7 @@
 			aiDescription: 'Button to navigate to resources'
 		},
 		{
-			label: 'Assets',
+			label: t('sidebar.assets'),
 			href: `${base}/assets`,
 			icon: Pyramid,
 			disabled: $userStore?.operator,
@@ -252,7 +253,7 @@
 		...($tutorialsToDo.length > 0 && !$skippedAll
 			? [
 					{
-						label: 'Tutorials',
+						label: t('sidebar.tutorials'),
 						href: `${base}/tutorials`,
 						icon: GraduationCap,
 						aiId: 'sidebar-menu-link-tutorials-main',
@@ -263,7 +264,7 @@
 	])
 	let defaultExtraTriggerLinks = $derived([
 		{
-			label: 'HTTP',
+			label: t('sidebar.http'),
 			href: '/routes',
 			icon: Route,
 			disabled: $userStore?.operator,
@@ -272,7 +273,7 @@
 			aiDescription: 'Button to navigate to HTTP routes'
 		},
 		{
-			label: 'WebSockets',
+			label: t('sidebar.websockets'),
 			href: '/websocket_triggers',
 			icon: Unplug,
 			disabled: $userStore?.operator,
@@ -281,7 +282,7 @@
 			aiDescription: 'Button to navigate to websocket triggers'
 		},
 		{
-			label: 'Postgres',
+			label: t('sidebar.postgres'),
 			href: '/postgres_triggers',
 			icon: Database,
 			disabled: $userStore?.operator,
@@ -290,7 +291,7 @@
 			aiDescription: 'Button to navigate to Postgres triggers'
 		},
 		{
-			label: 'Kafka' + ($enterpriseLicense ? '' : ' (EE)'),
+			label: t('sidebar.kafka') + ($enterpriseLicense ? '' : ' (EE)'),
 			href: '/kafka_triggers',
 			icon: KafkaIcon,
 			disabled: $userStore?.operator || !$enterpriseLicense,
@@ -299,7 +300,7 @@
 			aiDescription: 'Button to navigate to Kafka triggers'
 		},
 		{
-			label: 'NATS' + ($enterpriseLicense ? '' : ' (EE)'),
+			label: t('sidebar.nats') + ($enterpriseLicense ? '' : ' (EE)'),
 			href: '/nats_triggers',
 			icon: NatsIcon,
 			disabled: $userStore?.operator || !$enterpriseLicense,
@@ -308,7 +309,7 @@
 			aiDescription: 'Button to navigate to NATS triggers'
 		},
 		{
-			label: 'SQS' + ($enterpriseLicense ? '' : ' (EE)'),
+			label: t('sidebar.sqs') + ($enterpriseLicense ? '' : ' (EE)'),
 			href: '/sqs_triggers',
 			icon: AwsIcon,
 			disabled: $userStore?.operator || !$enterpriseLicense,
@@ -317,7 +318,7 @@
 			aiDescription: 'Button to navigate to SQS triggers'
 		},
 		{
-			label: 'GCP Pub/Sub' + ($enterpriseLicense ? '' : ' (EE)'),
+			label: t('sidebar.gcp_pubsub') + ($enterpriseLicense ? '' : ' (EE)'),
 			href: '/gcp_triggers',
 			icon: GoogleCloudIcon,
 			disabled: $userStore?.operator || !$enterpriseLicense,
@@ -326,7 +327,7 @@
 			aiDescription: 'Button to navigate to GCP Pub/Sub triggers'
 		},
 		{
-			label: 'MQTT',
+			label: t('sidebar.mqtt'),
 			href: '/mqtt_triggers',
 			icon: MqttIcon,
 			disabled: $userStore?.operator,
@@ -335,7 +336,7 @@
 			aiDescription: 'Button to navigate to MQTT triggers'
 		},
 		{
-			label: 'Email',
+			label: t('sidebar.email'),
 			href: '/email_triggers',
 			icon: MailIcon,
 			disabled: $userStore?.operator,
@@ -361,7 +362,7 @@
 
 	let triggerMenuLinks = $derived([
 		{
-			label: 'Schedules',
+			label: t('sidebar.schedules'),
 			href: `${base}/schedules`,
 			icon: Calendar,
 			disabled: !SIDEBAR_SHOW_SCHEDULES || $userStore?.operator,
@@ -385,14 +386,14 @@
 		// 	disabled: !$userStore?.is_admin && !$userStore?.is_super_admin
 		// },
 		{
-			label: 'Settings',
+			label: t('sidebar.settings'),
 			icon: Settings,
 			aiId: 'sidebar-menu-link-settings',
 			aiDescription:
 				'Button to navigate to settings, including account, workspace, and instance settings',
 			subItems: [
 				{
-					label: 'Account',
+					label: t('sidebar.account'),
 					href: '#user-settings',
 					icon: UserCog,
 					aiId: 'sidebar-menu-link-account',
@@ -402,7 +403,7 @@
 				...($userStore?.is_admin || $superadmin
 					? [
 							{
-								label: 'Workspace',
+								label: t('sidebar.workspace'),
 								href: `${base}/workspace_settings`,
 								icon: FolderCog,
 								aiId: 'sidebar-menu-link-workspace',
@@ -414,7 +415,7 @@
 				...($superadmin
 					? [
 							{
-								label: 'Instance',
+								label: t('sidebar.instance'),
 								href: '#superadmin-settings',
 								icon: ServerCog,
 								aiId: 'sidebar-menu-link-instance',
@@ -426,7 +427,7 @@
 				...(!$superadmin && !$userStore?.is_admin
 					? [
 							{
-								label: 'Leave workspace',
+								label: t('sidebar.leave_workspace'),
 								action: () => {
 									leaveWorkspaceModal = true
 								},
@@ -439,7 +440,7 @@
 				...($workspaceStore?.startsWith('wm-fork-')
 					? [
 							{
-								label: 'Delete Forked Workspace',
+								label: t('sidebar.delete_fork'),
 								action: () => {
 									deleteWorkspaceForkModal = true
 								},
@@ -452,7 +453,7 @@
 			disabled: $userStore?.operator
 		},
 		{
-			label: 'Workers',
+			label: t('sidebar.workers'),
 			href: `${base}/workers`,
 			icon: ServerCog,
 			disabled: $userStore?.operator,
@@ -460,13 +461,13 @@
 			aiDescription: 'Button to navigate to workers'
 		},
 		{
-			label: 'Folders & Groups',
+			label: t('sidebar.folders_groups'),
 			icon: FolderOpen,
 			aiId: 'sidebar-menu-link-folders-groups',
 			aiDescription: 'Button to navigate to folders and groups',
 			subItems: [
 				{
-					label: 'Folders',
+					label: t('sidebar.folders'),
 					href: `${base}/folders`,
 					icon: FolderOpen,
 					disabled: $userStore?.operator,
@@ -475,7 +476,7 @@
 					faIcon: undefined
 				},
 				{
-					label: 'Groups',
+					label: t('sidebar.groups'),
 					href: `${base}/groups`,
 					icon: UserCog,
 					disabled: $userStore?.operator,
@@ -488,13 +489,13 @@
 		},
 		$devopsRole || $userStore?.is_admin
 			? {
-					label: 'Logs',
+					label: t('sidebar.logs'),
 					icon: Logs,
 					aiId: 'sidebar-menu-link-logs',
 					aiDescription: 'Button to navigate to logs',
 					subItems: [
 						{
-							label: 'Audit logs',
+							label: t('sidebar.audit_logs'),
 							href: `${base}/audit_logs`,
 							icon: Eye,
 							aiId: 'sidebar-menu-link-audit-logs',
@@ -503,7 +504,7 @@
 						...($devopsRole
 							? [
 									{
-										label: 'Service logs',
+										label: t('sidebar.service_logs'),
 										href: `${base}/service_logs`,
 										icon: Logs,
 										aiId: 'sidebar-menu-link-service-logs',
@@ -514,7 +515,7 @@
 						...($enterpriseLicense
 							? [
 									{
-										label: 'Critical alerts',
+										label: t('sidebar.critical_alerts'),
 										action: () => {
 											isCriticalAlertsUIOpen.set(true)
 										},
@@ -528,7 +529,7 @@
 					]
 				}
 			: {
-					label: 'Audit logs',
+					label: t('sidebar.audit_logs'),
 					href: `${base}/audit_logs`,
 					icon: Eye,
 					disabled: $userStore?.operator,
@@ -552,7 +553,7 @@
 		<div class="pt-4">
 			<div
 				class="text-secondary text-[0.5rem] uppercase transition-opacity"
-				class:opacity-0={isCollapsed}>Triggers</div
+				class:opacity-0={isCollapsed}>{t('sidebar.triggers')}</div
 			>
 			<Menubar class="flex flex-col gap-1">
 				{#snippet children({ createMenu })}
diff --git a/frontend/src/lib/components/sidebar/UserMenu.svelte b/frontend/src/lib/components/sidebar/UserMenu.svelte
index b6e6d6a9cc..bb3bb03a59 100644
--- a/frontend/src/lib/components/sidebar/UserMenu.svelte
+++ b/frontend/src/lib/components/sidebar/UserMenu.svelte
@@ -11,11 +11,14 @@
 	import { USER_SETTINGS_HASH } from './settings'
 	import { isCloudHosted } from '$lib/cloud'
 	import { twMerge } from 'tailwind-merge'
-	import { Crown, ServerCog, LogOut, Moon, Settings, Sun, User } from 'lucide-svelte'
+	import { Crown, ServerCog, LogOut, Moon, Settings, Sun, User, Languages } from 'lucide-svelte'
 	import DarkModeObserver from '../DarkModeObserver.svelte'
 	import MenuButton from './MenuButton.svelte'
 	import { Menu, MenuItem } from '$lib/components/meltComponents'
 	import { type MenubarBuilders } from '@melt-ui/svelte'
+	import { t } from '$lib/i18n/t.svelte'
+	import { getLocale, setLocale } from '$lib/i18n/t.svelte'
+	import { SUPPORTED_LOCALES, LOCALE_NAMES } from '$lib/i18n/index'
 
 	let darkMode: boolean = $state(false)
 
@@ -53,16 +56,16 @@
 			</p>
 			<span class="text-xs text-primary flex flex-row gap-2 items-center">
 				{#if $userStore?.is_admin}
-					Admin of this workspace <Crown size={14} />
+					{t('user.admin_of_workspace')} <Crown size={14} />
 				{:else if $userStore?.operator}
-					Operator in this workspace <ServerCog size={14} />
+					{t('user.operator_in_workspace')} <ServerCog size={14} />
 				{/if}
 			</span>
 		</div>
 		<div class="py-1">
 			<MenuItem href={USER_SETTINGS_HASH} class={itemClass} {item}>
 				<Settings size={16} />
-				Account settings
+				{t('user.account_settings')}
 			</MenuItem>
 
 			<MenuItem
@@ -83,12 +86,25 @@
 				{:else}
 					<Moon size={16} />
 				{/if}
-				Switch theme
+				{t('user.switch_theme')}
+			</MenuItem>
+
+			<MenuItem
+				onClick={() => {
+					const currentIndex = SUPPORTED_LOCALES.indexOf(getLocale())
+					const nextIndex = (currentIndex + 1) % SUPPORTED_LOCALES.length
+					setLocale(SUPPORTED_LOCALES[nextIndex])
+				}}
+				class={itemClass}
+				{item}
+			>
+				<Languages size={16} />
+				{t('user.language')}: {LOCALE_NAMES[getLocale()]}
 			</MenuItem>
 
 			<MenuItem onClick={() => logout()} class={itemClass} {item}>
 				<LogOut size={16} />
-				Sign out
+				{t('user.sign_out')}
 			</MenuItem>
 		</div>
 
@@ -125,7 +141,7 @@
 							}}
 							{item}
 						>
-							Upgrade
+							{t('user.upgrade')}
 						</MenuItem>
 					{/if}
 				{:else}
@@ -136,7 +152,7 @@
 						}}
 						{item}
 					>
-						Premium plan
+						{t('user.premium_plan')}
 					</MenuItem>
 				{/if}
 			</div>
diff --git a/frontend/src/lib/i18n/index.ts b/frontend/src/lib/i18n/index.ts
new file mode 100644
index 0000000000..5fbe595a41
--- /dev/null
+++ b/frontend/src/lib/i18n/index.ts
@@ -0,0 +1,14 @@
+export const SUPPORTED_LOCALES = ['en', 'fr', 'de', 'es', 'pt', 'ja', 'zh', 'ko'] as const
+export type Locale = (typeof SUPPORTED_LOCALES)[number]
+export const DEFAULT_LOCALE: Locale = 'en'
+
+export const LOCALE_NAMES: Record<Locale, string> = {
+	en: 'English',
+	fr: 'Français',
+	de: 'Deutsch',
+	es: 'Español',
+	pt: 'Português',
+	ja: '日本語',
+	zh: '中文',
+	ko: '한국어'
+}
diff --git a/frontend/src/lib/i18n/messages/de.ts b/frontend/src/lib/i18n/messages/de.ts
new file mode 100644
index 0000000000..9a67e9379e
--- /dev/null
+++ b/frontend/src/lib/i18n/messages/de.ts
@@ -0,0 +1,90 @@
+import type { MessageKey } from './en'
+
+export const de: Record<MessageKey, string> = {
+	// Sidebar - main nav
+	'sidebar.home': 'Start',
+	'sidebar.runs': 'Ausführungen',
+	'sidebar.variables': 'Variablen',
+	'sidebar.resources': 'Ressourcen',
+	'sidebar.assets': 'Assets',
+	'sidebar.tutorials': 'Tutorials',
+
+	// Sidebar - triggers section
+	'sidebar.triggers': 'Trigger',
+	'sidebar.schedules': 'Zeitpläne',
+	'sidebar.http': 'HTTP',
+	'sidebar.websockets': 'WebSockets',
+	'sidebar.postgres': 'Postgres',
+	'sidebar.kafka': 'Kafka',
+	'sidebar.nats': 'NATS',
+	'sidebar.sqs': 'SQS',
+	'sidebar.gcp_pubsub': 'GCP Pub/Sub',
+	'sidebar.mqtt': 'MQTT',
+	'sidebar.email': 'E-Mail',
+
+	// Sidebar - settings
+	'sidebar.settings': 'Einstellungen',
+	'sidebar.account': 'Konto',
+	'sidebar.workspace': 'Workspace',
+	'sidebar.instance': 'Instanz',
+	'sidebar.leave_workspace': 'Verlassen',
+	'sidebar.delete_fork': 'Fork löschen',
+	'sidebar.workers': 'Workers',
+	'sidebar.folders_groups': 'Ordner & Gruppen',
+	'sidebar.folders': 'Ordner',
+	'sidebar.groups': 'Gruppen',
+	'sidebar.logs': 'Protokolle',
+	'sidebar.audit_logs': 'Audit',
+	'sidebar.service_logs': 'Dienste',
+	'sidebar.critical_alerts': 'Kritische Alerts',
+
+	// Sidebar - help
+	'sidebar.help': 'Hilfe',
+	'sidebar.docs': 'Doku',
+	'sidebar.feedbacks': 'Feedback',
+	'sidebar.issues': 'Issues',
+	'sidebar.changelog': 'Changelog',
+
+	// User menu
+	'user.account_settings': 'Kontoeinstellungen',
+	'user.switch_theme': 'Design wechseln',
+	'user.sign_out': 'Abmelden',
+	'user.upgrade': 'Upgrade',
+	'user.premium_plan': 'Premium-Plan',
+	'user.admin_of_workspace': 'Admin',
+	'user.operator_in_workspace': 'Operator',
+	'user.language': 'Sprache',
+
+	// Operator menu
+	'operator.custom_http_routes': 'HTTP-Routen',
+	'operator.websocket_triggers': 'WebSocket-Trigger',
+	'operator.postgres_triggers': 'Postgres-Trigger',
+	'operator.kafka_triggers': 'Kafka-Trigger',
+	'operator.nats_triggers': 'NATS-Trigger',
+	'operator.sqs_triggers': 'SQS-Trigger',
+	'operator.gcp_triggers': 'GCP-Trigger',
+	'operator.mqtt_triggers': 'MQTT-Trigger',
+	'operator.email_triggers': 'E-Mail-Trigger',
+
+	// Common actions
+	'action.save': 'Speichern',
+	'action.cancel': 'Abbrechen',
+	'action.delete': 'Löschen',
+	'action.edit': 'Bearbeiten',
+	'action.create': 'Erstellen',
+	'action.run': 'Ausführen',
+	'action.deploy': 'Deployen',
+	'action.share': 'Teilen',
+	'action.close': 'Schließen',
+	'action.confirm': 'Bestätigen',
+	'action.refresh': 'Aktualisieren',
+
+	// Page headers
+	'page.home': 'Start',
+	'page.variables': 'Variablen',
+	'page.resources': 'Ressourcen',
+	'page.schedules': 'Zeitpläne',
+	'page.workers': 'Workers',
+	'page.folders': 'Ordner',
+	'page.groups': 'Gruppen'
+}
diff --git a/frontend/src/lib/i18n/messages/en.ts b/frontend/src/lib/i18n/messages/en.ts
new file mode 100644
index 0000000000..ea19ac4689
--- /dev/null
+++ b/frontend/src/lib/i18n/messages/en.ts
@@ -0,0 +1,90 @@
+export const en = {
+	// Sidebar - main nav
+	'sidebar.home': 'Home',
+	'sidebar.runs': 'Runs',
+	'sidebar.variables': 'Variables',
+	'sidebar.resources': 'Resources',
+	'sidebar.assets': 'Assets',
+	'sidebar.tutorials': 'Tutorials',
+
+	// Sidebar - triggers section
+	'sidebar.triggers': 'Triggers',
+	'sidebar.schedules': 'Schedules',
+	'sidebar.http': 'HTTP',
+	'sidebar.websockets': 'WebSockets',
+	'sidebar.postgres': 'Postgres',
+	'sidebar.kafka': 'Kafka',
+	'sidebar.nats': 'NATS',
+	'sidebar.sqs': 'SQS',
+	'sidebar.gcp_pubsub': 'GCP Pub/Sub',
+	'sidebar.mqtt': 'MQTT',
+	'sidebar.email': 'Email',
+
+	// Sidebar - settings
+	'sidebar.settings': 'Settings',
+	'sidebar.account': 'Account',
+	'sidebar.workspace': 'Workspace',
+	'sidebar.instance': 'Instance',
+	'sidebar.leave_workspace': 'Leave workspace',
+	'sidebar.delete_fork': 'Delete Forked Workspace',
+	'sidebar.workers': 'Workers',
+	'sidebar.folders_groups': 'Folders & Groups',
+	'sidebar.folders': 'Folders',
+	'sidebar.groups': 'Groups',
+	'sidebar.logs': 'Logs',
+	'sidebar.audit_logs': 'Audit logs',
+	'sidebar.service_logs': 'Service logs',
+	'sidebar.critical_alerts': 'Critical alerts',
+
+	// Sidebar - help
+	'sidebar.help': 'Help',
+	'sidebar.docs': 'Docs',
+	'sidebar.feedbacks': 'Feedbacks',
+	'sidebar.issues': 'Issues',
+	'sidebar.changelog': 'Changelog',
+
+	// User menu
+	'user.account_settings': 'Account settings',
+	'user.switch_theme': 'Switch theme',
+	'user.sign_out': 'Sign out',
+	'user.upgrade': 'Upgrade',
+	'user.premium_plan': 'Premium plan',
+	'user.admin_of_workspace': 'Admin of this workspace',
+	'user.operator_in_workspace': 'Operator in this workspace',
+	'user.language': 'Language',
+
+	// Operator menu
+	'operator.custom_http_routes': 'Custom HTTP routes',
+	'operator.websocket_triggers': 'Websocket triggers',
+	'operator.postgres_triggers': 'Postgres triggers',
+	'operator.kafka_triggers': 'Kafka triggers',
+	'operator.nats_triggers': 'NATS triggers',
+	'operator.sqs_triggers': 'SQS triggers',
+	'operator.gcp_triggers': 'GCP Pub/Sub triggers',
+	'operator.mqtt_triggers': 'MQTT triggers',
+	'operator.email_triggers': 'Email triggers',
+
+	// Common actions
+	'action.save': 'Save',
+	'action.cancel': 'Cancel',
+	'action.delete': 'Delete',
+	'action.edit': 'Edit',
+	'action.create': 'Create',
+	'action.run': 'Run',
+	'action.deploy': 'Deploy',
+	'action.share': 'Share',
+	'action.close': 'Close',
+	'action.confirm': 'Confirm',
+	'action.refresh': 'Refresh',
+
+	// Page headers
+	'page.home': 'Home',
+	'page.variables': 'Variables',
+	'page.resources': 'Resources',
+	'page.schedules': 'Schedules',
+	'page.workers': 'Workers',
+	'page.folders': 'Folders',
+	'page.groups': 'Groups'
+} as const
+
+export type MessageKey = keyof typeof en
diff --git a/frontend/src/lib/i18n/messages/es.ts b/frontend/src/lib/i18n/messages/es.ts
new file mode 100644
index 0000000000..35cfb561ba
--- /dev/null
+++ b/frontend/src/lib/i18n/messages/es.ts
@@ -0,0 +1,90 @@
+import type { MessageKey } from './en'
+
+export const es: Record<MessageKey, string> = {
+	// Sidebar - main nav
+	'sidebar.home': 'Inicio',
+	'sidebar.runs': 'Ejecuciones',
+	'sidebar.variables': 'Variables',
+	'sidebar.resources': 'Recursos',
+	'sidebar.assets': 'Assets',
+	'sidebar.tutorials': 'Tutoriales',
+
+	// Sidebar - triggers section
+	'sidebar.triggers': 'Disparadores',
+	'sidebar.schedules': 'Programados',
+	'sidebar.http': 'HTTP',
+	'sidebar.websockets': 'WebSockets',
+	'sidebar.postgres': 'Postgres',
+	'sidebar.kafka': 'Kafka',
+	'sidebar.nats': 'NATS',
+	'sidebar.sqs': 'SQS',
+	'sidebar.gcp_pubsub': 'GCP Pub/Sub',
+	'sidebar.mqtt': 'MQTT',
+	'sidebar.email': 'Email',
+
+	// Sidebar - settings
+	'sidebar.settings': 'Ajustes',
+	'sidebar.account': 'Cuenta',
+	'sidebar.workspace': 'Espacio',
+	'sidebar.instance': 'Instancia',
+	'sidebar.leave_workspace': 'Salir',
+	'sidebar.delete_fork': 'Eliminar fork',
+	'sidebar.workers': 'Workers',
+	'sidebar.folders_groups': 'Carpetas y Grupos',
+	'sidebar.folders': 'Carpetas',
+	'sidebar.groups': 'Grupos',
+	'sidebar.logs': 'Registros',
+	'sidebar.audit_logs': 'Auditoría',
+	'sidebar.service_logs': 'Servicios',
+	'sidebar.critical_alerts': 'Alertas críticas',
+
+	// Sidebar - help
+	'sidebar.help': 'Ayuda',
+	'sidebar.docs': 'Docs',
+	'sidebar.feedbacks': 'Comentarios',
+	'sidebar.issues': 'Issues',
+	'sidebar.changelog': 'Changelog',
+
+	// User menu
+	'user.account_settings': 'Mi cuenta',
+	'user.switch_theme': 'Cambiar tema',
+	'user.sign_out': 'Cerrar sesión',
+	'user.upgrade': 'Mejorar plan',
+	'user.premium_plan': 'Plan premium',
+	'user.admin_of_workspace': 'Admin',
+	'user.operator_in_workspace': 'Operador',
+	'user.language': 'Idioma',
+
+	// Operator menu
+	'operator.custom_http_routes': 'Rutas HTTP',
+	'operator.websocket_triggers': 'Triggers WebSocket',
+	'operator.postgres_triggers': 'Triggers Postgres',
+	'operator.kafka_triggers': 'Triggers Kafka',
+	'operator.nats_triggers': 'Triggers NATS',
+	'operator.sqs_triggers': 'Triggers SQS',
+	'operator.gcp_triggers': 'Triggers GCP',
+	'operator.mqtt_triggers': 'Triggers MQTT',
+	'operator.email_triggers': 'Triggers email',
+
+	// Common actions
+	'action.save': 'Guardar',
+	'action.cancel': 'Cancelar',
+	'action.delete': 'Eliminar',
+	'action.edit': 'Editar',
+	'action.create': 'Crear',
+	'action.run': 'Ejecutar',
+	'action.deploy': 'Desplegar',
+	'action.share': 'Compartir',
+	'action.close': 'Cerrar',
+	'action.confirm': 'Confirmar',
+	'action.refresh': 'Actualizar',
+
+	// Page headers
+	'page.home': 'Inicio',
+	'page.variables': 'Variables',
+	'page.resources': 'Recursos',
+	'page.schedules': 'Programados',
+	'page.workers': 'Workers',
+	'page.folders': 'Carpetas',
+	'page.groups': 'Grupos'
+}
diff --git a/frontend/src/lib/i18n/messages/fr.ts b/frontend/src/lib/i18n/messages/fr.ts
new file mode 100644
index 0000000000..b40a9bdac4
--- /dev/null
+++ b/frontend/src/lib/i18n/messages/fr.ts
@@ -0,0 +1,90 @@
+import type { MessageKey } from './en'
+
+export const fr: Record<MessageKey, string> = {
+	// Sidebar - main nav
+	'sidebar.home': 'Accueil',
+	'sidebar.runs': 'Exécutions',
+	'sidebar.variables': 'Variables',
+	'sidebar.resources': 'Ressources',
+	'sidebar.assets': 'Assets',
+	'sidebar.tutorials': 'Tutoriels',
+
+	// Sidebar - triggers section
+	'sidebar.triggers': 'Déclencheurs',
+	'sidebar.schedules': 'Plannings',
+	'sidebar.http': 'HTTP',
+	'sidebar.websockets': 'WebSockets',
+	'sidebar.postgres': 'Postgres',
+	'sidebar.kafka': 'Kafka',
+	'sidebar.nats': 'NATS',
+	'sidebar.sqs': 'SQS',
+	'sidebar.gcp_pubsub': 'GCP Pub/Sub',
+	'sidebar.mqtt': 'MQTT',
+	'sidebar.email': 'Email',
+
+	// Sidebar - settings
+	'sidebar.settings': 'Paramètres',
+	'sidebar.account': 'Compte',
+	'sidebar.workspace': 'Espace',
+	'sidebar.instance': 'Instance',
+	'sidebar.leave_workspace': 'Quitter',
+	'sidebar.delete_fork': 'Supprimer le fork',
+	'sidebar.workers': 'Workers',
+	'sidebar.folders_groups': 'Dossiers & Groupes',
+	'sidebar.folders': 'Dossiers',
+	'sidebar.groups': 'Groupes',
+	'sidebar.logs': 'Journaux',
+	'sidebar.audit_logs': 'Audit',
+	'sidebar.service_logs': 'Services',
+	'sidebar.critical_alerts': 'Alertes critiques',
+
+	// Sidebar - help
+	'sidebar.help': 'Aide',
+	'sidebar.docs': 'Docs',
+	'sidebar.feedbacks': 'Retours',
+	'sidebar.issues': 'Issues',
+	'sidebar.changelog': 'Changelog',
+
+	// User menu
+	'user.account_settings': 'Mon compte',
+	'user.switch_theme': 'Changer de thème',
+	'user.sign_out': 'Déconnexion',
+	'user.upgrade': 'Passer en premium',
+	'user.premium_plan': 'Plan premium',
+	'user.admin_of_workspace': 'Admin de cet espace',
+	'user.operator_in_workspace': 'Opérateur',
+	'user.language': 'Langue',
+
+	// Operator menu
+	'operator.custom_http_routes': 'Routes HTTP',
+	'operator.websocket_triggers': 'Déclencheurs WS',
+	'operator.postgres_triggers': 'Déclencheurs PG',
+	'operator.kafka_triggers': 'Déclencheurs Kafka',
+	'operator.nats_triggers': 'Déclencheurs NATS',
+	'operator.sqs_triggers': 'Déclencheurs SQS',
+	'operator.gcp_triggers': 'Déclencheurs GCP',
+	'operator.mqtt_triggers': 'Déclencheurs MQTT',
+	'operator.email_triggers': 'Déclencheurs email',
+
+	// Common actions
+	'action.save': 'Enregistrer',
+	'action.cancel': 'Annuler',
+	'action.delete': 'Supprimer',
+	'action.edit': 'Modifier',
+	'action.create': 'Créer',
+	'action.run': 'Lancer',
+	'action.deploy': 'Déployer',
+	'action.share': 'Partager',
+	'action.close': 'Fermer',
+	'action.confirm': 'Confirmer',
+	'action.refresh': 'Actualiser',
+
+	// Page headers
+	'page.home': 'Accueil',
+	'page.variables': 'Variables',
+	'page.resources': 'Ressources',
+	'page.schedules': 'Plannings',
+	'page.workers': 'Workers',
+	'page.folders': 'Dossiers',
+	'page.groups': 'Groupes'
+}
diff --git a/frontend/src/lib/i18n/messages/index.ts b/frontend/src/lib/i18n/messages/index.ts
new file mode 100644
index 0000000000..2d915de831
--- /dev/null
+++ b/frontend/src/lib/i18n/messages/index.ts
@@ -0,0 +1,22 @@
+import type { Locale } from '../index'
+import { en, type MessageKey } from './en'
+import { fr } from './fr'
+import { de } from './de'
+import { es } from './es'
+import { pt } from './pt'
+import { ja } from './ja'
+import { zh } from './zh'
+import { ko } from './ko'
+
+export type { MessageKey }
+
+export const messages: Record<Locale, Record<MessageKey, string>> = {
+	en,
+	fr,
+	de,
+	es,
+	pt,
+	ja,
+	zh,
+	ko
+}
diff --git a/frontend/src/lib/i18n/messages/ja.ts b/frontend/src/lib/i18n/messages/ja.ts
new file mode 100644
index 0000000000..16c5ea3479
--- /dev/null
+++ b/frontend/src/lib/i18n/messages/ja.ts
@@ -0,0 +1,90 @@
+import type { MessageKey } from './en'
+
+export const ja: Record<MessageKey, string> = {
+	// Sidebar - main nav
+	'sidebar.home': 'ホーム',
+	'sidebar.runs': '実行',
+	'sidebar.variables': '変数',
+	'sidebar.resources': 'リソース',
+	'sidebar.assets': 'アセット',
+	'sidebar.tutorials': 'チュートリアル',
+
+	// Sidebar - triggers section
+	'sidebar.triggers': 'トリガー',
+	'sidebar.schedules': 'スケジュール',
+	'sidebar.http': 'HTTP',
+	'sidebar.websockets': 'WebSockets',
+	'sidebar.postgres': 'Postgres',
+	'sidebar.kafka': 'Kafka',
+	'sidebar.nats': 'NATS',
+	'sidebar.sqs': 'SQS',
+	'sidebar.gcp_pubsub': 'GCP Pub/Sub',
+	'sidebar.mqtt': 'MQTT',
+	'sidebar.email': 'メール',
+
+	// Sidebar - settings
+	'sidebar.settings': '設定',
+	'sidebar.account': 'アカウント',
+	'sidebar.workspace': 'ワークスペース',
+	'sidebar.instance': 'インスタンス',
+	'sidebar.leave_workspace': '退出',
+	'sidebar.delete_fork': 'フォークを削除',
+	'sidebar.workers': 'ワーカー',
+	'sidebar.folders_groups': 'フォルダとグループ',
+	'sidebar.folders': 'フォルダ',
+	'sidebar.groups': 'グループ',
+	'sidebar.logs': 'ログ',
+	'sidebar.audit_logs': '監査ログ',
+	'sidebar.service_logs': 'サービスログ',
+	'sidebar.critical_alerts': '重要なアラート',
+
+	// Sidebar - help
+	'sidebar.help': 'ヘルプ',
+	'sidebar.docs': 'ドキュメント',
+	'sidebar.feedbacks': 'フィードバック',
+	'sidebar.issues': 'Issues',
+	'sidebar.changelog': '変更履歴',
+
+	// User menu
+	'user.account_settings': 'アカウント設定',
+	'user.switch_theme': 'テーマ切替',
+	'user.sign_out': 'ログアウト',
+	'user.upgrade': 'アップグレード',
+	'user.premium_plan': 'プレミアムプラン',
+	'user.admin_of_workspace': '管理者',
+	'user.operator_in_workspace': 'オペレーター',
+	'user.language': '言語',
+
+	// Operator menu
+	'operator.custom_http_routes': 'HTTPルート',
+	'operator.websocket_triggers': 'WebSocketトリガー',
+	'operator.postgres_triggers': 'Postgresトリガー',
+	'operator.kafka_triggers': 'Kafkaトリガー',
+	'operator.nats_triggers': 'NATSトリガー',
+	'operator.sqs_triggers': 'SQSトリガー',
+	'operator.gcp_triggers': 'GCPトリガー',
+	'operator.mqtt_triggers': 'MQTTトリガー',
+	'operator.email_triggers': 'メールトリガー',
+
+	// Common actions
+	'action.save': '保存',
+	'action.cancel': 'キャンセル',
+	'action.delete': '削除',
+	'action.edit': '編集',
+	'action.create': '作成',
+	'action.run': '実行',
+	'action.deploy': 'デプロイ',
+	'action.share': '共有',
+	'action.close': '閉じる',
+	'action.confirm': '確認',
+	'action.refresh': '更新',
+
+	// Page headers
+	'page.home': 'ホーム',
+	'page.variables': '変数',
+	'page.resources': 'リソース',
+	'page.schedules': 'スケジュール',
+	'page.workers': 'ワーカー',
+	'page.folders': 'フォルダ',
+	'page.groups': 'グループ'
+}
diff --git a/frontend/src/lib/i18n/messages/ko.ts b/frontend/src/lib/i18n/messages/ko.ts
new file mode 100644
index 0000000000..68e7ab73ba
--- /dev/null
+++ b/frontend/src/lib/i18n/messages/ko.ts
@@ -0,0 +1,90 @@
+import type { MessageKey } from './en'
+
+export const ko: Record<MessageKey, string> = {
+	// Sidebar - main nav
+	'sidebar.home': '홈',
+	'sidebar.runs': '실행',
+	'sidebar.variables': '변수',
+	'sidebar.resources': '리소스',
+	'sidebar.assets': '에셋',
+	'sidebar.tutorials': '튜토리얼',
+
+	// Sidebar - triggers section
+	'sidebar.triggers': '트리거',
+	'sidebar.schedules': '스케줄',
+	'sidebar.http': 'HTTP',
+	'sidebar.websockets': 'WebSockets',
+	'sidebar.postgres': 'Postgres',
+	'sidebar.kafka': 'Kafka',
+	'sidebar.nats': 'NATS',
+	'sidebar.sqs': 'SQS',
+	'sidebar.gcp_pubsub': 'GCP Pub/Sub',
+	'sidebar.mqtt': 'MQTT',
+	'sidebar.email': '이메일',
+
+	// Sidebar - settings
+	'sidebar.settings': '설정',
+	'sidebar.account': '계정',
+	'sidebar.workspace': '워크스페이스',
+	'sidebar.instance': '인스턴스',
+	'sidebar.leave_workspace': '나가기',
+	'sidebar.delete_fork': '포크 삭제',
+	'sidebar.workers': '워커',
+	'sidebar.folders_groups': '폴더 및 그룹',
+	'sidebar.folders': '폴더',
+	'sidebar.groups': '그룹',
+	'sidebar.logs': '로그',
+	'sidebar.audit_logs': '감사 로그',
+	'sidebar.service_logs': '서비스 로그',
+	'sidebar.critical_alerts': '심각한 알림',
+
+	// Sidebar - help
+	'sidebar.help': '도움말',
+	'sidebar.docs': '문서',
+	'sidebar.feedbacks': '피드백',
+	'sidebar.issues': 'Issues',
+	'sidebar.changelog': '변경 내역',
+
+	// User menu
+	'user.account_settings': '계정 설정',
+	'user.switch_theme': '테마 전환',
+	'user.sign_out': '로그아웃',
+	'user.upgrade': '업그레이드',
+	'user.premium_plan': '프리미엄 플랜',
+	'user.admin_of_workspace': '관리자',
+	'user.operator_in_workspace': '운영자',
+	'user.language': '언어',
+
+	// Operator menu
+	'operator.custom_http_routes': 'HTTP 라우트',
+	'operator.websocket_triggers': 'WebSocket 트리거',
+	'operator.postgres_triggers': 'Postgres 트리거',
+	'operator.kafka_triggers': 'Kafka 트리거',
+	'operator.nats_triggers': 'NATS 트리거',
+	'operator.sqs_triggers': 'SQS 트리거',
+	'operator.gcp_triggers': 'GCP 트리거',
+	'operator.mqtt_triggers': 'MQTT 트리거',
+	'operator.email_triggers': '이메일 트리거',
+
+	// Common actions
+	'action.save': '저장',
+	'action.cancel': '취소',
+	'action.delete': '삭제',
+	'action.edit': '편집',
+	'action.create': '생성',
+	'action.run': '실행',
+	'action.deploy': '배포',
+	'action.share': '공유',
+	'action.close': '닫기',
+	'action.confirm': '확인',
+	'action.refresh': '새로고침',
+
+	// Page headers
+	'page.home': '홈',
+	'page.variables': '변수',
+	'page.resources': '리소스',
+	'page.schedules': '스케줄',
+	'page.workers': '워커',
+	'page.folders': '폴더',
+	'page.groups': '그룹'
+}
diff --git a/frontend/src/lib/i18n/messages/pt.ts b/frontend/src/lib/i18n/messages/pt.ts
new file mode 100644
index 0000000000..b648c12baa
--- /dev/null
+++ b/frontend/src/lib/i18n/messages/pt.ts
@@ -0,0 +1,90 @@
+import type { MessageKey } from './en'
+
+export const pt: Record<MessageKey, string> = {
+	// Sidebar - main nav
+	'sidebar.home': 'Início',
+	'sidebar.runs': 'Execuções',
+	'sidebar.variables': 'Variáveis',
+	'sidebar.resources': 'Recursos',
+	'sidebar.assets': 'Assets',
+	'sidebar.tutorials': 'Tutoriais',
+
+	// Sidebar - triggers section
+	'sidebar.triggers': 'Gatilhos',
+	'sidebar.schedules': 'Agendamentos',
+	'sidebar.http': 'HTTP',
+	'sidebar.websockets': 'WebSockets',
+	'sidebar.postgres': 'Postgres',
+	'sidebar.kafka': 'Kafka',
+	'sidebar.nats': 'NATS',
+	'sidebar.sqs': 'SQS',
+	'sidebar.gcp_pubsub': 'GCP Pub/Sub',
+	'sidebar.mqtt': 'MQTT',
+	'sidebar.email': 'Email',
+
+	// Sidebar - settings
+	'sidebar.settings': 'Configurações',
+	'sidebar.account': 'Conta',
+	'sidebar.workspace': 'Workspace',
+	'sidebar.instance': 'Instância',
+	'sidebar.leave_workspace': 'Sair',
+	'sidebar.delete_fork': 'Excluir fork',
+	'sidebar.workers': 'Workers',
+	'sidebar.folders_groups': 'Pastas e Grupos',
+	'sidebar.folders': 'Pastas',
+	'sidebar.groups': 'Grupos',
+	'sidebar.logs': 'Logs',
+	'sidebar.audit_logs': 'Auditoria',
+	'sidebar.service_logs': 'Serviços',
+	'sidebar.critical_alerts': 'Alertas críticos',
+
+	// Sidebar - help
+	'sidebar.help': 'Ajuda',
+	'sidebar.docs': 'Docs',
+	'sidebar.feedbacks': 'Feedbacks',
+	'sidebar.issues': 'Issues',
+	'sidebar.changelog': 'Changelog',
+
+	// User menu
+	'user.account_settings': 'Minha conta',
+	'user.switch_theme': 'Mudar tema',
+	'user.sign_out': 'Sair',
+	'user.upgrade': 'Upgrade',
+	'user.premium_plan': 'Plano premium',
+	'user.admin_of_workspace': 'Admin',
+	'user.operator_in_workspace': 'Operador',
+	'user.language': 'Idioma',
+
+	// Operator menu
+	'operator.custom_http_routes': 'Rotas HTTP',
+	'operator.websocket_triggers': 'Triggers WebSocket',
+	'operator.postgres_triggers': 'Triggers Postgres',
+	'operator.kafka_triggers': 'Triggers Kafka',
+	'operator.nats_triggers': 'Triggers NATS',
+	'operator.sqs_triggers': 'Triggers SQS',
+	'operator.gcp_triggers': 'Triggers GCP',
+	'operator.mqtt_triggers': 'Triggers MQTT',
+	'operator.email_triggers': 'Triggers email',
+
+	// Common actions
+	'action.save': 'Salvar',
+	'action.cancel': 'Cancelar',
+	'action.delete': 'Excluir',
+	'action.edit': 'Editar',
+	'action.create': 'Criar',
+	'action.run': 'Executar',
+	'action.deploy': 'Implantar',
+	'action.share': 'Compartilhar',
+	'action.close': 'Fechar',
+	'action.confirm': 'Confirmar',
+	'action.refresh': 'Atualizar',
+
+	// Page headers
+	'page.home': 'Início',
+	'page.variables': 'Variáveis',
+	'page.resources': 'Recursos',
+	'page.schedules': 'Agendamentos',
+	'page.workers': 'Workers',
+	'page.folders': 'Pastas',
+	'page.groups': 'Grupos'
+}
diff --git a/frontend/src/lib/i18n/messages/zh.ts b/frontend/src/lib/i18n/messages/zh.ts
new file mode 100644
index 0000000000..c87b25f6fb
--- /dev/null
+++ b/frontend/src/lib/i18n/messages/zh.ts
@@ -0,0 +1,90 @@
+import type { MessageKey } from './en'
+
+export const zh: Record<MessageKey, string> = {
+	// Sidebar - main nav
+	'sidebar.home': '首页',
+	'sidebar.runs': '运行',
+	'sidebar.variables': '变量',
+	'sidebar.resources': '资源',
+	'sidebar.assets': '资产',
+	'sidebar.tutorials': '教程',
+
+	// Sidebar - triggers section
+	'sidebar.triggers': '触发器',
+	'sidebar.schedules': '定时任务',
+	'sidebar.http': 'HTTP',
+	'sidebar.websockets': 'WebSockets',
+	'sidebar.postgres': 'Postgres',
+	'sidebar.kafka': 'Kafka',
+	'sidebar.nats': 'NATS',
+	'sidebar.sqs': 'SQS',
+	'sidebar.gcp_pubsub': 'GCP Pub/Sub',
+	'sidebar.mqtt': 'MQTT',
+	'sidebar.email': '邮件',
+
+	// Sidebar - settings
+	'sidebar.settings': '设置',
+	'sidebar.account': '账户',
+	'sidebar.workspace': '工作区',
+	'sidebar.instance': '实例',
+	'sidebar.leave_workspace': '退出',
+	'sidebar.delete_fork': '删除分支',
+	'sidebar.workers': 'Workers',
+	'sidebar.folders_groups': '文件夹和分组',
+	'sidebar.folders': '文件夹',
+	'sidebar.groups': '分组',
+	'sidebar.logs': '日志',
+	'sidebar.audit_logs': '审计日志',
+	'sidebar.service_logs': '服务日志',
+	'sidebar.critical_alerts': '严重告警',
+
+	// Sidebar - help
+	'sidebar.help': '帮助',
+	'sidebar.docs': '文档',
+	'sidebar.feedbacks': '反馈',
+	'sidebar.issues': 'Issues',
+	'sidebar.changelog': '更新日志',
+
+	// User menu
+	'user.account_settings': '账户设置',
+	'user.switch_theme': '切换主题',
+	'user.sign_out': '退出登录',
+	'user.upgrade': '升级',
+	'user.premium_plan': '高级版',
+	'user.admin_of_workspace': '管理员',
+	'user.operator_in_workspace': '操作员',
+	'user.language': '语言',
+
+	// Operator menu
+	'operator.custom_http_routes': 'HTTP路由',
+	'operator.websocket_triggers': 'WebSocket触发器',
+	'operator.postgres_triggers': 'Postgres触发器',
+	'operator.kafka_triggers': 'Kafka触发器',
+	'operator.nats_triggers': 'NATS触发器',
+	'operator.sqs_triggers': 'SQS触发器',
+	'operator.gcp_triggers': 'GCP触发器',
+	'operator.mqtt_triggers': 'MQTT触发器',
+	'operator.email_triggers': '邮件触发器',
+
+	// Common actions
+	'action.save': '保存',
+	'action.cancel': '取消',
+	'action.delete': '删除',
+	'action.edit': '编辑',
+	'action.create': '创建',
+	'action.run': '运行',
+	'action.deploy': '部署',
+	'action.share': '共享',
+	'action.close': '关闭',
+	'action.confirm': '确认',
+	'action.refresh': '刷新',
+
+	// Page headers
+	'page.home': '首页',
+	'page.variables': '变量',
+	'page.resources': '资源',
+	'page.schedules': '定时任务',
+	'page.workers': 'Workers',
+	'page.folders': '文件夹',
+	'page.groups': '分组'
+}
diff --git a/frontend/src/lib/i18n/t.svelte.ts b/frontend/src/lib/i18n/t.svelte.ts
new file mode 100644
index 0000000000..da68dd3ae2
--- /dev/null
+++ b/frontend/src/lib/i18n/t.svelte.ts
@@ -0,0 +1,33 @@
+import { getLocalSetting, storeLocalSetting } from '$lib/utils'
+import { type Locale, DEFAULT_LOCALE, SUPPORTED_LOCALES } from './index'
+import { en, type MessageKey } from './messages/en'
+import { messages } from './messages/index'
+
+function getInitialLocale(): Locale {
+	const stored = getLocalSetting('locale')
+	if (stored && SUPPORTED_LOCALES.includes(stored as Locale)) {
+		return stored as Locale
+	}
+	return DEFAULT_LOCALE
+}
+
+let locale = $state<Locale>(getInitialLocale())
+
+export function getLocale(): Locale {
+	return locale
+}
+
+export function setLocale(l: Locale) {
+	locale = l
+	storeLocalSetting('locale', l)
+	if (typeof document !== 'undefined') {
+		document.documentElement.lang = l
+	}
+}
+
+export function t(key: MessageKey): string {
+	if (locale === 'en') {
+		return en[key]
+	}
+	return messages[locale]?.[key] ?? en[key]
+}