diff --git a/packages/ui/package.json b/packages/ui/package.json
index 6ed1418..96f7c41 100644
--- a/packages/ui/package.json
+++ b/packages/ui/package.json
@@ -40,6 +40,8 @@
   },
   "exports": {
     "./globals.css": "./src/styles/globals.css",
+    "./locales": "./src/i18n/catalogs.ts",
+    "./locales/*": "./src/i18n/locales/*.ts",
     "./lib/*": "./src/lib/*.ts",
     "./components/*": "./src/components/*.tsx",
     "./hooks/*": "./src/hooks/*.ts"
diff --git a/packages/ui/src/components/breadcrumb.tsx b/packages/ui/src/components/breadcrumb.tsx
index 8925952..2ad885f 100644
--- a/packages/ui/src/components/breadcrumb.tsx
+++ b/packages/ui/src/components/breadcrumb.tsx
@@ -4,11 +4,18 @@ import { useRender } from "@base-ui/react/use-render"
 
 import { cn } from "@workspace/ui/lib/utils"
 import { ChevronRightIcon, MoreHorizontalIcon } from "lucide-react"
+import { LocalizedText, uiMessages, useMessage } from "./i18n"
+
+function Breadcrumb({
+  "aria-label": ariaLabel,
+  className,
+  ...props
+}: React.ComponentProps<"nav">) {
+  const defaultLabel = useMessage(uiMessages.breadcrumb)
 
-function Breadcrumb({ className, ...props }: React.ComponentProps<"nav">) {
   return (
     <nav
-      aria-label="breadcrumb"
+      aria-label={ariaLabel ?? defaultLabel}
       data-slot="breadcrumb"
       className={cn(className)}
       {...props}
@@ -85,9 +92,7 @@ function BreadcrumbSeparator({
       className={cn("[&>svg]:size-3.5", className)}
       {...props}
     >
-      {children ?? (
-        <ChevronRightIcon className="rtl:rotate-180" />
-      )}
+      {children ?? <ChevronRightIcon className="rtl:rotate-180" />}
     </li>
   )
 }
@@ -107,9 +112,10 @@ function BreadcrumbEllipsis({
       )}
       {...props}
     >
-      <MoreHorizontalIcon
-      />
-      <span className="sr-only">More</span>
+      <MoreHorizontalIcon />
+      <span className="sr-only">
+        <LocalizedText message={uiMessages.more} />
+      </span>
     </span>
   )
 }
diff --git a/packages/ui/src/components/calendar.tsx b/packages/ui/src/components/calendar.tsx
index 4bb169f..53008ea 100644
--- a/packages/ui/src/components/calendar.tsx
+++ b/packages/ui/src/components/calendar.tsx
@@ -5,12 +5,16 @@ import {
   DayPicker,
   getDefaultClassNames,
   type DayButton,
-  type Locale,
 } from "react-day-picker"
 
 import { cn } from "@workspace/ui/lib/utils"
 import { Button, buttonVariants } from "@workspace/ui/components/button"
-import { ChevronLeftIcon, ChevronRightIcon, ChevronDownIcon } from "lucide-react"
+import { useCalendarLocale, useLocale } from "@workspace/ui/components/i18n"
+import {
+  ChevronLeftIcon,
+  ChevronRightIcon,
+  ChevronDownIcon,
+} from "lucide-react"
 
 function Calendar({
   className,
@@ -18,7 +22,8 @@ function Calendar({
   showOutsideDays = true,
   captionLayout = "label",
   buttonVariant = "ghost",
-  locale,
+  locale: providedLocale,
+  lang,
   formatters,
   components,
   ...props
@@ -26,6 +31,10 @@ function Calendar({
   buttonVariant?: React.ComponentProps<typeof Button>["variant"]
 }) {
   const defaultClassNames = getDefaultClassNames()
+  const contextLocale = useLocale()
+  const contextCalendarLocale = useCalendarLocale()
+  const locale = providedLocale ?? contextCalendarLocale
+  const localeCode = locale?.code ?? contextLocale
 
   return (
     <DayPicker
@@ -38,9 +47,10 @@ function Calendar({
       )}
       captionLayout={captionLayout}
       locale={locale}
+      lang={lang ?? localeCode}
       formatters={{
         formatMonthDropdown: (date) =>
-          date.toLocaleString(locale?.code, { month: "short" }),
+          date.toLocaleString(localeCode, { month: "short" }),
         ...formatters,
       }}
       classNames={{
@@ -147,13 +157,19 @@ function Calendar({
         Chevron: ({ className, orientation, ...props }) => {
           if (orientation === "left") {
             return (
-              <ChevronLeftIcon className={cn("rtl:rotate-180 size-4", className)} {...props} />
+              <ChevronLeftIcon
+                className={cn("size-4 rtl:rotate-180", className)}
+                {...props}
+              />
             )
           }
 
           if (orientation === "right") {
             return (
-              <ChevronRightIcon className={cn("rtl:rotate-180 size-4", className)} {...props} />
+              <ChevronRightIcon
+                className={cn("size-4 rtl:rotate-180", className)}
+                {...props}
+              />
             )
           }
 
@@ -162,7 +178,7 @@ function Calendar({
           )
         },
         DayButton: ({ ...props }) => (
-          <CalendarDayButton locale={locale} {...props} />
+          <CalendarDayButton locale={localeCode} {...props} />
         ),
         WeekNumber: ({ children, ...props }) => {
           return (
@@ -186,7 +202,7 @@ function CalendarDayButton({
   modifiers,
   locale,
   ...props
-}: React.ComponentProps<typeof DayButton> & { locale?: Partial<Locale> }) {
+}: React.ComponentProps<typeof DayButton> & { locale?: string }) {
   const defaultClassNames = getDefaultClassNames()
 
   const ref = React.useRef<HTMLButtonElement>(null)
@@ -198,7 +214,7 @@ function CalendarDayButton({
     <Button
       variant="ghost"
       size="icon"
-      data-day={day.date.toLocaleDateString(locale?.code)}
+      data-day={day.date.toLocaleDateString(locale)}
       data-selected-single={
         modifiers.selected &&
         !modifiers.range_start &&
diff --git a/packages/ui/src/components/carousel.tsx b/packages/ui/src/components/carousel.tsx
index 77194e3..b171af5 100644
--- a/packages/ui/src/components/carousel.tsx
+++ b/packages/ui/src/components/carousel.tsx
@@ -6,6 +6,7 @@ import useEmblaCarousel, {
 import { cn } from "@workspace/ui/lib/utils"
 import { Button } from "@workspace/ui/components/button"
 import { ChevronLeftIcon, ChevronRightIcon } from "lucide-react"
+import { LocalizedText, uiMessages } from "./i18n"
 
 type CarouselApi = UseEmblaCarouselType[1]
 type UseCarouselParameters = Parameters<typeof useEmblaCarousel>
@@ -186,7 +187,7 @@ function CarouselPrevious({
         "absolute touch-manipulation rounded-full",
         orientation === "horizontal"
           ? "inset-y-0 -start-12 my-auto"
-          : "-top-12 start-1/2 -translate-x-1/2 rtl:translate-x-1/2 rotate-90",
+          : "start-1/2 -top-12 -translate-x-1/2 rotate-90 rtl:translate-x-1/2",
         className
       )}
       disabled={!canScrollPrev}
@@ -194,7 +195,9 @@ function CarouselPrevious({
       {...props}
     >
       <ChevronLeftIcon className="rtl:rotate-180" />
-      <span className="sr-only">Previous slide</span>
+      <span className="sr-only">
+        <LocalizedText message={uiMessages.previousSlide} />
+      </span>
     </Button>
   )
 }
@@ -216,7 +219,7 @@ function CarouselNext({
         "absolute touch-manipulation rounded-full",
         orientation === "horizontal"
           ? "inset-y-0 -end-12 my-auto"
-          : "-bottom-12 start-1/2 -translate-x-1/2 rtl:translate-x-1/2 rotate-90",
+          : "start-1/2 -bottom-12 -translate-x-1/2 rotate-90 rtl:translate-x-1/2",
         className
       )}
       disabled={!canScrollNext}
@@ -224,7 +227,9 @@ function CarouselNext({
       {...props}
     >
       <ChevronRightIcon className="rtl:rotate-180" />
-      <span className="sr-only">Next slide</span>
+      <span className="sr-only">
+        <LocalizedText message={uiMessages.nextSlide} />
+      </span>
     </Button>
   )
 }
diff --git a/packages/ui/src/components/dialog.tsx b/packages/ui/src/components/dialog.tsx
index b1e7aad..ba105ba 100644
--- a/packages/ui/src/components/dialog.tsx
+++ b/packages/ui/src/components/dialog.tsx
@@ -6,6 +6,7 @@ import { Dialog as DialogPrimitive } from "@base-ui/react/dialog"
 import { cn } from "@workspace/ui/lib/utils"
 import { Button } from "@workspace/ui/components/button"
 import { XIcon } from "lucide-react"
+import { LocalizedText, uiMessages } from "./i18n"
 
 type DialogHandle<Payload> = DialogPrimitive.Handle<Payload>
 
@@ -59,7 +60,7 @@ function DialogContent({
       <DialogPrimitive.Popup
         data-slot="dialog-content"
         className={cn(
-          "fixed top-1/2 start-1/2 z-50 grid w-full max-w-[calc(100%-2rem)] -translate-x-1/2 rtl:translate-x-1/2 -translate-y-1/2 gap-6 rounded-xl bg-popover p-6 text-sm text-popover-foreground ring-1 ring-foreground/10 duration-100 outline-none sm:max-w-md data-open:animate-in data-open:fade-in-0 data-open:zoom-in-95 data-closed:animate-out data-closed:fade-out-0 data-closed:zoom-out-95",
+          "fixed start-1/2 top-1/2 z-50 grid w-full max-w-[calc(100%-2rem)] -translate-x-1/2 -translate-y-1/2 gap-6 rounded-xl bg-popover p-6 text-sm text-popover-foreground ring-1 ring-foreground/10 duration-100 outline-none sm:max-w-md rtl:translate-x-1/2 data-open:animate-in data-open:fade-in-0 data-open:zoom-in-95 data-closed:animate-out data-closed:fade-out-0 data-closed:zoom-out-95",
           className
         )}
         {...props}
@@ -71,14 +72,15 @@ function DialogContent({
             render={
               <Button
                 variant="ghost"
-                className="absolute top-4 end-4"
+                className="absolute end-4 top-4"
                 size="icon-sm"
               />
             }
           >
-            <XIcon
-            />
-            <span className="sr-only">Close</span>
+            <XIcon />
+            <span className="sr-only">
+              <LocalizedText message={uiMessages.close} />
+            </span>
           </DialogPrimitive.Close>
         )}
       </DialogPrimitive.Popup>
@@ -116,7 +118,7 @@ function DialogFooter({
       {children}
       {showCloseButton && (
         <DialogPrimitive.Close render={<Button variant="outline" />}>
-          Close
+          <LocalizedText message={uiMessages.close} />
         </DialogPrimitive.Close>
       )}
     </div>
diff --git a/packages/ui/src/components/i18n.tsx b/packages/ui/src/components/i18n.tsx
new file mode 100644
index 0000000..3e6e0c8
--- /dev/null
+++ b/packages/ui/src/components/i18n.tsx
@@ -0,0 +1,156 @@
+"use client"
+
+import * as React from "react"
+import type { Locale as DayPickerLocale } from "react-day-picker"
+
+export type MessageValues = Record<string, unknown>
+
+export interface MessageDescriptor {
+  id: string
+  message: string
+  comment?: string
+  values?: MessageValues
+}
+
+export type TranslateFunction = (
+  descriptor: MessageDescriptor,
+  values?: MessageValues
+) => string
+
+export type CalendarLocale = Partial<DayPickerLocale>
+
+type UiMessages = Record<string, MessageDescriptor>
+
+export const uiMessages = {
+  breadcrumb: /* i18n */ {
+    id: "ui.breadcrumb.label",
+    message: "Breadcrumb",
+  },
+  close: /* i18n */ {
+    id: "ui.common.close",
+    message: "Close",
+  },
+  closeToast: /* i18n */ {
+    id: "ui.toast.close",
+    message: "Close notification",
+  },
+  loading: /* i18n */ {
+    id: "ui.common.loading",
+    message: "Loading",
+  },
+  more: /* i18n */ {
+    id: "ui.common.more",
+    message: "More",
+  },
+  morePages: /* i18n */ {
+    id: "ui.pagination.more",
+    message: "More pages",
+  },
+  next: /* i18n */ {
+    id: "ui.pagination.next",
+    message: "Next",
+  },
+  nextPage: /* i18n */ {
+    id: "ui.pagination.nextPage",
+    message: "Go to next page",
+  },
+  nextSlide: /* i18n */ {
+    id: "ui.carousel.nextSlide",
+    message: "Next slide",
+  },
+  pagination: /* i18n */ {
+    id: "ui.pagination.label",
+    message: "Pagination",
+  },
+  previous: /* i18n */ {
+    id: "ui.pagination.previous",
+    message: "Previous",
+  },
+  previousPage: /* i18n */ {
+    id: "ui.pagination.previousPage",
+    message: "Go to previous page",
+  },
+  previousSlide: /* i18n */ {
+    id: "ui.carousel.previousSlide",
+    message: "Previous slide",
+  },
+  sidebar: /* i18n */ {
+    id: "ui.sidebar.title",
+    message: "Sidebar",
+  },
+  sidebarDescription: /* i18n */ {
+    id: "ui.sidebar.description",
+    message: "Displays the mobile sidebar.",
+  },
+  toggleSidebar: /* i18n */ {
+    id: "ui.sidebar.toggle",
+    message: "Toggle sidebar",
+  },
+} satisfies UiMessages
+
+const DEFAULT_LOCALE = "en-US"
+const defaultTranslate: TranslateFunction = (descriptor) => descriptor.message
+
+const TranslateContext =
+  React.createContext<TranslateFunction>(defaultTranslate)
+const LocaleContext = React.createContext(DEFAULT_LOCALE)
+const CalendarLocaleContext = React.createContext<CalendarLocale | undefined>(
+  undefined
+)
+
+export interface I18nProviderProps {
+  calendarLocale?: CalendarLocale
+  children: React.ReactNode
+  locale?: string
+  t?: TranslateFunction
+}
+
+export function I18nProvider({
+  calendarLocale,
+  children,
+  locale = DEFAULT_LOCALE,
+  t = defaultTranslate,
+}: I18nProviderProps) {
+  return (
+    <TranslateContext.Provider value={t}>
+      <LocaleContext.Provider value={locale}>
+        <CalendarLocaleContext.Provider value={calendarLocale}>
+          {children}
+        </CalendarLocaleContext.Provider>
+      </LocaleContext.Provider>
+    </TranslateContext.Provider>
+  )
+}
+
+export function useTranslate(): TranslateFunction {
+  return React.useContext(TranslateContext)
+}
+
+export function useMessage(
+  descriptor: MessageDescriptor,
+  values?: MessageValues
+) {
+  const translate = useTranslate()
+
+  return React.useMemo(
+    () => translate(descriptor, values),
+    [descriptor, translate, values]
+  )
+}
+
+export interface LocalizedTextProps {
+  message: MessageDescriptor
+  values?: MessageValues
+}
+
+export function LocalizedText({ message, values }: LocalizedTextProps) {
+  return useMessage(message, values)
+}
+
+export function useLocale(): string {
+  return React.useContext(LocaleContext)
+}
+
+export function useCalendarLocale(): CalendarLocale | undefined {
+  return React.useContext(CalendarLocaleContext)
+}
diff --git a/packages/ui/src/components/pagination.tsx b/packages/ui/src/components/pagination.tsx
index e961401..42620f0 100644
--- a/packages/ui/src/components/pagination.tsx
+++ b/packages/ui/src/components/pagination.tsx
@@ -2,13 +2,24 @@ import * as React from "react"
 
 import { cn } from "@workspace/ui/lib/utils"
 import { Button } from "@workspace/ui/components/button"
-import { ChevronLeftIcon, ChevronRightIcon, MoreHorizontalIcon } from "lucide-react"
+import {
+  ChevronLeftIcon,
+  ChevronRightIcon,
+  MoreHorizontalIcon,
+} from "lucide-react"
+import { LocalizedText, uiMessages, useMessage } from "./i18n"
+
+function Pagination({
+  "aria-label": ariaLabel,
+  className,
+  ...props
+}: React.ComponentProps<"nav">) {
+  const defaultLabel = useMessage(uiMessages.pagination)
 
-function Pagination({ className, ...props }: React.ComponentProps<"nav">) {
   return (
     <nav
       role="navigation"
-      aria-label="pagination"
+      aria-label={ariaLabel ?? defaultLabel}
       data-slot="pagination"
       className={cn("mx-auto flex w-full justify-center", className)}
       {...props}
@@ -64,35 +75,43 @@ function PaginationLink({
 
 function PaginationPrevious({
   className,
-  text = "Previous",
+  text,
+  "aria-label": ariaLabel,
   ...props
 }: React.ComponentProps<typeof PaginationLink> & { text?: string }) {
+  const previousLabel = useMessage(uiMessages.previous)
+  const previousPageLabel = useMessage(uiMessages.previousPage)
+
   return (
     <PaginationLink
-      aria-label="Go to previous page"
+      aria-label={ariaLabel ?? previousPageLabel}
       size="default"
       className={cn("ps-2!", className)}
       {...props}
     >
       <ChevronLeftIcon data-icon="inline-start" className="rtl:rotate-180" />
-      <span className="hidden sm:block">{text}</span>
+      <span className="hidden sm:block">{text ?? previousLabel}</span>
     </PaginationLink>
   )
 }
 
 function PaginationNext({
   className,
-  text = "Next",
+  text,
+  "aria-label": ariaLabel,
   ...props
 }: React.ComponentProps<typeof PaginationLink> & { text?: string }) {
+  const nextLabel = useMessage(uiMessages.next)
+  const nextPageLabel = useMessage(uiMessages.nextPage)
+
   return (
     <PaginationLink
-      aria-label="Go to next page"
+      aria-label={ariaLabel ?? nextPageLabel}
       size="default"
       className={cn("pe-2!", className)}
       {...props}
     >
-      <span className="hidden sm:block">{text}</span>
+      <span className="hidden sm:block">{text ?? nextLabel}</span>
       <ChevronRightIcon data-icon="inline-end" className="rtl:rotate-180" />
     </PaginationLink>
   )
@@ -112,9 +131,10 @@ function PaginationEllipsis({
       )}
       {...props}
     >
-      <MoreHorizontalIcon
-      />
-      <span className="sr-only">More pages</span>
+      <MoreHorizontalIcon />
+      <span className="sr-only">
+        <LocalizedText message={uiMessages.morePages} />
+      </span>
     </span>
   )
 }
diff --git a/packages/ui/src/components/sheet.tsx b/packages/ui/src/components/sheet.tsx
index 8ce7eb1..bcac5fd 100644
--- a/packages/ui/src/components/sheet.tsx
+++ b/packages/ui/src/components/sheet.tsx
@@ -6,6 +6,7 @@ import { Dialog as SheetPrimitive } from "@base-ui/react/dialog"
 import { cn } from "@workspace/ui/lib/utils"
 import { Button } from "@workspace/ui/components/button"
 import { XIcon } from "lucide-react"
+import { LocalizedText, uiMessages } from "./i18n"
 
 function createSheetHandle<Payload>(): SheetPrimitive.Handle<Payload> {
   return SheetPrimitive.createHandle<Payload>()
@@ -75,7 +76,9 @@ function SheetContent({
             }
           >
             <XIcon />
-            <span className="sr-only">Close</span>
+            <span className="sr-only">
+              <LocalizedText message={uiMessages.close} />
+            </span>
           </SheetPrimitive.Close>
         )}
       </SheetPrimitive.Popup>
diff --git a/packages/ui/src/components/sidebar.tsx b/packages/ui/src/components/sidebar.tsx
index e5679b0..c7cc2d4 100644
--- a/packages/ui/src/components/sidebar.tsx
+++ b/packages/ui/src/components/sidebar.tsx
@@ -22,6 +22,7 @@ import {
   TooltipTrigger,
 } from "@workspace/ui/components/tooltip"
 import { PanelLeftIcon } from "lucide-react"
+import { LocalizedText, uiMessages, useMessage } from "./i18n"
 
 const SIDEBAR_COOKIE_NAME = "sidebar_state"
 const SIDEBAR_COOKIE_MAX_AGE = 60 * 60 * 24 * 7
@@ -194,8 +195,12 @@ function Sidebar({
           side={side}
         >
           <SheetHeader className="sr-only">
-            <SheetTitle>Sidebar</SheetTitle>
-            <SheetDescription>Displays the mobile sidebar.</SheetDescription>
+            <SheetTitle>
+              <LocalizedText message={uiMessages.sidebar} />
+            </SheetTitle>
+            <SheetDescription>
+              <LocalizedText message={uiMessages.sidebarDescription} />
+            </SheetDescription>
           </SheetHeader>
           <div className="flex h-full w-full flex-col">{children}</div>
         </SheetContent>
@@ -270,27 +275,35 @@ function SidebarTrigger({
       {...props}
     >
       <PanelLeftIcon className="rtl:rotate-180" />
-      <span className="sr-only">Toggle Sidebar</span>
+      <span className="sr-only">
+        <LocalizedText message={uiMessages.toggleSidebar} />
+      </span>
     </Button>
   )
 }
 
-function SidebarRail({ className, ...props }: React.ComponentProps<"button">) {
+function SidebarRail({
+  "aria-label": ariaLabel,
+  className,
+  title,
+  ...props
+}: React.ComponentProps<"button">) {
   const { toggleSidebar } = useSidebar()
+  const toggleSidebarLabel = useMessage(uiMessages.toggleSidebar)
 
   return (
     <button
       data-sidebar="rail"
       data-slot="sidebar-rail"
-      aria-label="Toggle Sidebar"
+      aria-label={ariaLabel ?? toggleSidebarLabel}
       tabIndex={-1}
       onClick={toggleSidebar}
-      title="Toggle Sidebar"
+      title={title ?? toggleSidebarLabel}
       className={cn(
         "absolute inset-y-0 z-20 hidden w-4 transition-all ease-linear group-data-[side=left]:-right-4 group-data-[side=right]:left-0 after:absolute after:inset-y-0 after:start-1/2 after:w-[2px] hover:after:bg-sidebar-border sm:flex ltr:-translate-x-1/2 rtl:-translate-x-1/2",
-        "in-data-[side=left]:cursor-w-resize rtl:in-data-[side=left]:cursor-e-resize in-data-[side=right]:cursor-e-resize rtl:in-data-[side=right]:cursor-w-resize",
+        "in-data-[side=left]:cursor-w-resize in-data-[side=right]:cursor-e-resize rtl:in-data-[side=left]:cursor-e-resize rtl:in-data-[side=right]:cursor-w-resize",
         "[[data-side=left][data-state=collapsed]_&]:cursor-e-resize rtl:[[data-side=left][data-state=collapsed]_&]:cursor-w-resize [[data-side=right][data-state=collapsed]_&]:cursor-w-resize rtl:[[data-side=right][data-state=collapsed]_&]:cursor-e-resize",
-        "group-data-[collapsible=offcanvas]:translate-x-0 rtl:group-data-[collapsible=offcanvas]:-translate-x-0 group-data-[collapsible=offcanvas]:after:start-full hover:group-data-[collapsible=offcanvas]:bg-sidebar",
+        "group-data-[collapsible=offcanvas]:translate-x-0 group-data-[collapsible=offcanvas]:after:start-full hover:group-data-[collapsible=offcanvas]:bg-sidebar rtl:group-data-[collapsible=offcanvas]:-translate-x-0",
         "[[data-side=left][data-collapsible=offcanvas]_&]:-end-2",
         "[[data-side=right][data-collapsible=offcanvas]_&]:-start-2",
         className
@@ -422,7 +435,7 @@ function SidebarGroupAction({
     props: mergeProps<"button">(
       {
         className: cn(
-          "absolute top-3.5 end-3 flex aspect-square w-5 items-center justify-center rounded-md p-0 text-sidebar-foreground ring-sidebar-ring outline-hidden transition-transform group-data-[collapsible=icon]:hidden after:absolute after:-inset-2 hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 md:after:hidden [&>svg]:size-4 [&>svg]:shrink-0",
+          "absolute end-3 top-3.5 flex aspect-square w-5 items-center justify-center rounded-md p-0 text-sidebar-foreground ring-sidebar-ring outline-hidden transition-transform group-data-[collapsible=icon]:hidden after:absolute after:-inset-2 hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 md:after:hidden [&>svg]:size-4 [&>svg]:shrink-0",
           className
         ),
       },
@@ -562,7 +575,7 @@ function SidebarMenuAction({
     props: mergeProps<"button">(
       {
         className: cn(
-          "absolute top-1.5 end-1 flex aspect-square w-5 items-center justify-center rounded-md p-0 text-sidebar-foreground ring-sidebar-ring outline-hidden transition-transform group-data-[collapsible=icon]:hidden peer-hover/menu-button:text-sidebar-accent-foreground peer-data-[size=default]/menu-button:top-1.5 peer-data-[size=lg]/menu-button:top-2.5 peer-data-[size=sm]/menu-button:top-1 after:absolute after:-inset-2 hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 md:after:hidden [&>svg]:size-4 [&>svg]:shrink-0",
+          "absolute end-1 top-1.5 flex aspect-square w-5 items-center justify-center rounded-md p-0 text-sidebar-foreground ring-sidebar-ring outline-hidden transition-transform group-data-[collapsible=icon]:hidden peer-hover/menu-button:text-sidebar-accent-foreground peer-data-[size=default]/menu-button:top-1.5 peer-data-[size=lg]/menu-button:top-2.5 peer-data-[size=sm]/menu-button:top-1 after:absolute after:-inset-2 hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 md:after:hidden [&>svg]:size-4 [&>svg]:shrink-0",
           showOnHover &&
             "group-focus-within/menu-item:opacity-100 group-hover/menu-item:opacity-100 peer-data-active/menu-button:text-sidebar-accent-foreground aria-expanded:opacity-100 md:opacity-0",
           className
@@ -639,7 +652,7 @@ function SidebarMenuSub({ className, ...props }: React.ComponentProps<"ul">) {
       data-slot="sidebar-menu-sub"
       data-sidebar="menu-sub"
       className={cn(
-        "mx-3.5 flex min-w-0 translate-x-px rtl:-translate-x-px flex-col gap-1 border-s border-sidebar-border px-2.5 py-0.5 group-data-[collapsible=icon]:hidden",
+        "mx-3.5 flex min-w-0 translate-x-px flex-col gap-1 border-s border-sidebar-border px-2.5 py-0.5 group-data-[collapsible=icon]:hidden rtl:-translate-x-px",
         className
       )}
       {...props}
@@ -677,7 +690,7 @@ function SidebarMenuSubButton({
     props: mergeProps<"a">(
       {
         className: cn(
-          "flex h-7 min-w-0 -translate-x-px rtl:translate-x-px items-center gap-2 overflow-hidden rounded-md px-2 text-sidebar-foreground ring-sidebar-ring outline-hidden group-data-[collapsible=icon]:hidden hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 active:bg-sidebar-accent active:text-sidebar-accent-foreground disabled:pointer-events-none disabled:opacity-50 aria-disabled:pointer-events-none aria-disabled:opacity-50 data-[size=md]:text-sm data-[size=sm]:text-xs data-active:bg-sidebar-accent data-active:text-sidebar-accent-foreground [&>span:last-child]:truncate [&>svg]:size-4 [&>svg]:shrink-0 [&>svg]:text-sidebar-accent-foreground",
+          "flex h-7 min-w-0 -translate-x-px items-center gap-2 overflow-hidden rounded-md px-2 text-sidebar-foreground ring-sidebar-ring outline-hidden group-data-[collapsible=icon]:hidden hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 active:bg-sidebar-accent active:text-sidebar-accent-foreground disabled:pointer-events-none disabled:opacity-50 aria-disabled:pointer-events-none aria-disabled:opacity-50 data-[size=md]:text-sm data-[size=sm]:text-xs rtl:translate-x-px data-active:bg-sidebar-accent data-active:text-sidebar-accent-foreground [&>span:last-child]:truncate [&>svg]:size-4 [&>svg]:shrink-0 [&>svg]:text-sidebar-accent-foreground",
           className
         ),
       },
diff --git a/packages/ui/src/components/spinner.tsx b/packages/ui/src/components/spinner.tsx
index 6c1b642..fa84d66 100644
--- a/packages/ui/src/components/spinner.tsx
+++ b/packages/ui/src/components/spinner.tsx
@@ -1,9 +1,18 @@
 import { cn } from "@workspace/ui/lib/utils"
 import { Loader2Icon } from "lucide-react"
+import { uiMessages, useMessage } from "./i18n"
 
 function Spinner({ className, ...props }: React.ComponentProps<"svg">) {
+  const loadingLabel = useMessage(uiMessages.loading)
+
   return (
-    <Loader2Icon data-slot="spinner" role="status" aria-label="Loading" className={cn("size-4 animate-spin", className)} {...props} />
+    <Loader2Icon
+      data-slot="spinner"
+      role="status"
+      aria-label={loadingLabel}
+      className={cn("size-4 animate-spin", className)}
+      {...props}
+    />
   )
 }
 
diff --git a/packages/ui/src/components/toast.tsx b/packages/ui/src/components/toast.tsx
index f098d19..ad09c27 100644
--- a/packages/ui/src/components/toast.tsx
+++ b/packages/ui/src/components/toast.tsx
@@ -3,7 +3,15 @@ import { Toast as ToastPrimitive } from "@base-ui/react/toast"
 
 import { cn } from "@workspace/ui/lib/utils"
 import { Button } from "@workspace/ui/components/button"
-import { XIcon, CircleCheckIcon, InfoIcon, TriangleAlertIcon, OctagonXIcon, Loader2Icon } from "lucide-react"
+import {
+  XIcon,
+  CircleCheckIcon,
+  InfoIcon,
+  TriangleAlertIcon,
+  OctagonXIcon,
+  Loader2Icon,
+} from "lucide-react"
+import { uiMessages, useMessage } from "./i18n"
 
 const toast = ToastPrimitive.createToastManager()
 
@@ -20,7 +28,7 @@ function ToastViewport({ className, ...props }: ToastPrimitive.Viewport.Props) {
     <ToastPrimitive.Viewport
       data-slot="toast-viewport"
       className={cn(
-        "pointer-events-none fixed inset-x-4 bottom-4 z-50 mx-auto w-auto max-w-sm outline-none sm:end-4 sm:start-auto sm:mx-0 sm:w-full",
+        "pointer-events-none fixed inset-x-4 bottom-4 z-50 mx-auto w-auto max-w-sm outline-none sm:start-auto sm:end-4 sm:mx-0 sm:w-full",
         className
       )}
       {...props}
@@ -35,19 +43,19 @@ function Toast({ className, ...props }: ToastPrimitive.Root.Props) {
       className={cn(
         "group/toast pointer-events-auto absolute end-0 bottom-0 z-[calc(1000-var(--toast-index))] w-full origin-bottom rounded-2xl border bg-popover text-popover-foreground shadow-lg will-change-transform outline-none select-none focus-visible:border-ring focus-visible:ring-[3px] focus-visible:ring-ring/50",
         "[--gap:0.75rem] [--height:var(--toast-frontmost-height,var(--toast-height))] [--offset-y:calc(var(--toast-offset-y)*-1+calc(var(--toast-index)*var(--gap)*-1)+var(--toast-swipe-movement-y))] [--peek:0.75rem] [--scale:calc(max(0,1-(var(--toast-index)*0.1)))] [--shrink:calc(1-var(--scale))]",
-        "h-(--height) [transform:translateX(var(--toast-swipe-movement-x))_translateY(calc(var(--toast-swipe-movement-y)-(var(--toast-index)*var(--peek))-(var(--shrink)*var(--height))))_scale(var(--scale))] [transition:transform_500ms_cubic-bezier(0.22,1,0.36,1),opacity_500ms,height_150ms]",
-        "after:absolute after:top-full after:start-0 after:h-[calc(var(--gap)+1px)] after:w-full after:content-['']",
-        "data-expanded:h-(--toast-height) data-expanded:[transform:translateX(var(--toast-swipe-movement-x))_translateY(var(--offset-y))]",
-        "data-limited:opacity-0 data-starting-style:[transform:translateY(150%)]",
-        "[&[data-ending-style]:not([data-limited]):not([data-swipe-direction])]:[transform:translateY(150%)]",
-        "data-ending-style:data-[swipe-direction=down]:[transform:translateY(calc(var(--toast-swipe-movement-y)+150%))]",
-        "data-ending-style:data-[swipe-direction=left]:[transform:translateX(calc(var(--toast-swipe-movement-x)-150%))_translateY(var(--offset-y))]",
-        "data-ending-style:data-[swipe-direction=right]:[transform:translateX(calc(var(--toast-swipe-movement-x)+150%))_translateY(var(--offset-y))]",
-        "data-ending-style:data-[swipe-direction=up]:[transform:translateY(calc(var(--toast-swipe-movement-y)-150%))]",
-        "data-expanded:data-ending-style:data-[swipe-direction=down]:[transform:translateY(calc(var(--toast-swipe-movement-y)+150%))]",
-        "data-expanded:data-ending-style:data-[swipe-direction=left]:[transform:translateX(calc(var(--toast-swipe-movement-x)-150%))_translateY(var(--offset-y))]",
-        "data-expanded:data-ending-style:data-[swipe-direction=right]:[transform:translateX(calc(var(--toast-swipe-movement-x)+150%))_translateY(var(--offset-y))]",
-        "data-expanded:data-ending-style:data-[swipe-direction=up]:[transform:translateY(calc(var(--toast-swipe-movement-y)-150%))]",
+        "h-(--height) transform-[translateX(var(--toast-swipe-movement-x))_translateY(calc(var(--toast-swipe-movement-y)-(var(--toast-index)*var(--peek))-(var(--shrink)*var(--height))))_scale(var(--scale))] [transition:transform_500ms_cubic-bezier(0.22,1,0.36,1),opacity_500ms,height_150ms]",
+        "after:absolute after:start-0 after:top-full after:h-[calc(var(--gap)+1px)] after:w-full after:content-['']",
+        "data-expanded:h-(--toast-height) data-expanded:transform-[translateX(var(--toast-swipe-movement-x))_translateY(var(--offset-y))]",
+        "data-limited:opacity-0 data-starting-style:transform-[translateY(150%)]",
+        "[&[data-ending-style]:not([data-limited]):not([data-swipe-direction])]:transform-[translateY(150%)]",
+        "data-ending-style:data-[swipe-direction=down]:transform-[translateY(calc(var(--toast-swipe-movement-y)+150%))]",
+        "data-ending-style:data-[swipe-direction=left]:transform-[translateX(calc(var(--toast-swipe-movement-x)-150%))_translateY(var(--offset-y))]",
+        "data-ending-style:data-[swipe-direction=right]:transform-[translateX(calc(var(--toast-swipe-movement-x)+150%))_translateY(var(--offset-y))]",
+        "data-ending-style:data-[swipe-direction=up]:transform-[translateY(calc(var(--toast-swipe-movement-y)-150%))]",
+        "data-expanded:data-ending-style:data-[swipe-direction=down]:transform-[translateY(calc(var(--toast-swipe-movement-y)+150%))]",
+        "data-expanded:data-ending-style:data-[swipe-direction=left]:transform-[translateX(calc(var(--toast-swipe-movement-x)-150%))_translateY(var(--offset-y))]",
+        "data-expanded:data-ending-style:data-[swipe-direction=right]:transform-[translateX(calc(var(--toast-swipe-movement-x)+150%))_translateY(var(--offset-y))]",
+        "data-expanded:data-ending-style:data-[swipe-direction=up]:transform-[translateY(calc(var(--toast-swipe-movement-y)-150%))]",
         className
       )}
       {...props}
@@ -107,15 +115,18 @@ function ToastAction({
 }
 
 function ToastClose({
+  "aria-label": ariaLabel,
   className,
   children,
   render = <Button variant="ghost" size="icon-sm" />,
   ...props
 }: ToastPrimitive.Close.Props) {
+  const closeLabel = useMessage(uiMessages.closeToast)
+
   return (
     <ToastPrimitive.Close
       data-slot="toast-close"
-      aria-label="Close toast"
+      aria-label={ariaLabel ?? closeLabel}
       render={render}
       className={cn(
         "relative shrink-0 text-muted-foreground after:absolute after:-inset-2 after:content-[''] hover:text-foreground",
@@ -123,9 +134,7 @@ function ToastClose({
       )}
       {...props}
     >
-      {children ?? (
-        <XIcon aria-hidden="true" />
-      )}
+      {children ?? <XIcon aria-hidden="true" />}
     </ToastPrimitive.Close>
   )
 }
@@ -134,33 +143,23 @@ function ToastIcon({ type }: { type: string | undefined }) {
   let icon: React.ReactNode = null
 
   if (type === "success") {
-    icon = (
-      <CircleCheckIcon aria-hidden="true" />
-    )
+    icon = <CircleCheckIcon aria-hidden="true" />
   }
 
   if (type === "info") {
-    icon = (
-      <InfoIcon aria-hidden="true" />
-    )
+    icon = <InfoIcon aria-hidden="true" />
   }
 
   if (type === "warning") {
-    icon = (
-      <TriangleAlertIcon aria-hidden="true" />
-    )
+    icon = <TriangleAlertIcon aria-hidden="true" />
   }
 
   if (type === "error") {
-    icon = (
-      <OctagonXIcon className="text-destructive" aria-hidden="true" />
-    )
+    icon = <OctagonXIcon className="text-destructive" aria-hidden="true" />
   }
 
   if (type === "loading") {
-    icon = (
-      <Loader2Icon className="animate-spin" aria-hidden="true" />
-    )
+    icon = <Loader2Icon className="animate-spin" aria-hidden="true" />
   }
 
   if (!icon) {
diff --git a/packages/ui/src/i18n/catalogs.ts b/packages/ui/src/i18n/catalogs.ts
new file mode 100644
index 0000000..26c9420
--- /dev/null
+++ b/packages/ui/src/i18n/catalogs.ts
@@ -0,0 +1,33 @@
+export const uiCatalogLocales = [
+  "de",
+  "en",
+  "es",
+  "fr",
+  "ja",
+  "ko",
+  "zh-Hans",
+  "zh-Hant",
+] as const
+
+export const uiMessageIds = [
+  "ui.breadcrumb.label",
+  "ui.carousel.nextSlide",
+  "ui.carousel.previousSlide",
+  "ui.common.close",
+  "ui.common.loading",
+  "ui.common.more",
+  "ui.pagination.label",
+  "ui.pagination.more",
+  "ui.pagination.next",
+  "ui.pagination.nextPage",
+  "ui.pagination.previous",
+  "ui.pagination.previousPage",
+  "ui.sidebar.description",
+  "ui.sidebar.title",
+  "ui.sidebar.toggle",
+  "ui.toast.close",
+] as const
+
+export type UiCatalogLocale = (typeof uiCatalogLocales)[number]
+export type UiMessageId = (typeof uiMessageIds)[number]
+export type UiMessageCatalog = Readonly<Record<UiMessageId, string>>
diff --git a/packages/ui/src/i18n/locales/de.ts b/packages/ui/src/i18n/locales/de.ts
new file mode 100644
index 0000000..7000158
--- /dev/null
+++ b/packages/ui/src/i18n/locales/de.ts
@@ -0,0 +1,25 @@
+export { de as calendarLocale } from "react-day-picker/locale/de"
+
+import type { UiMessageCatalog } from "../catalogs"
+
+export const locale = "de"
+export const languageTag = "de-DE"
+
+export const messages = {
+  "ui.breadcrumb.label": "Breadcrumb-Navigation",
+  "ui.carousel.nextSlide": "Nächste Folie",
+  "ui.carousel.previousSlide": "Vorherige Folie",
+  "ui.common.close": "Schließen",
+  "ui.common.loading": "Wird geladen",
+  "ui.common.more": "Mehr",
+  "ui.pagination.label": "Seitennavigation",
+  "ui.pagination.more": "Weitere Seiten",
+  "ui.pagination.next": "Weiter",
+  "ui.pagination.nextPage": "Zur nächsten Seite",
+  "ui.pagination.previous": "Zurück",
+  "ui.pagination.previousPage": "Zur vorherigen Seite",
+  "ui.sidebar.description": "Zeigt die mobile Seitenleiste an.",
+  "ui.sidebar.title": "Seitenleiste",
+  "ui.sidebar.toggle": "Seitenleiste umschalten",
+  "ui.toast.close": "Benachrichtigung schließen",
+} as const satisfies UiMessageCatalog
diff --git a/packages/ui/src/i18n/locales/en.ts b/packages/ui/src/i18n/locales/en.ts
new file mode 100644
index 0000000..cf3f2dc
--- /dev/null
+++ b/packages/ui/src/i18n/locales/en.ts
@@ -0,0 +1,25 @@
+export { enUS as calendarLocale } from "react-day-picker/locale/en-US"
+
+import type { UiMessageCatalog } from "../catalogs"
+
+export const locale = "en"
+export const languageTag = "en-US"
+
+export const messages = {
+  "ui.breadcrumb.label": "Breadcrumb",
+  "ui.carousel.nextSlide": "Next slide",
+  "ui.carousel.previousSlide": "Previous slide",
+  "ui.common.close": "Close",
+  "ui.common.loading": "Loading",
+  "ui.common.more": "More",
+  "ui.pagination.label": "Pagination",
+  "ui.pagination.more": "More pages",
+  "ui.pagination.next": "Next",
+  "ui.pagination.nextPage": "Go to next page",
+  "ui.pagination.previous": "Previous",
+  "ui.pagination.previousPage": "Go to previous page",
+  "ui.sidebar.description": "Displays the mobile sidebar.",
+  "ui.sidebar.title": "Sidebar",
+  "ui.sidebar.toggle": "Toggle sidebar",
+  "ui.toast.close": "Close notification",
+} as const satisfies UiMessageCatalog
diff --git a/packages/ui/src/i18n/locales/es.ts b/packages/ui/src/i18n/locales/es.ts
new file mode 100644
index 0000000..c3d53a7
--- /dev/null
+++ b/packages/ui/src/i18n/locales/es.ts
@@ -0,0 +1,25 @@
+export { es as calendarLocale } from "react-day-picker/locale/es"
+
+import type { UiMessageCatalog } from "../catalogs"
+
+export const locale = "es"
+export const languageTag = "es-ES"
+
+export const messages = {
+  "ui.breadcrumb.label": "Ruta de navegación",
+  "ui.carousel.nextSlide": "Diapositiva siguiente",
+  "ui.carousel.previousSlide": "Diapositiva anterior",
+  "ui.common.close": "Cerrar",
+  "ui.common.loading": "Cargando",
+  "ui.common.more": "Más",
+  "ui.pagination.label": "Paginación",
+  "ui.pagination.more": "Más páginas",
+  "ui.pagination.next": "Siguiente",
+  "ui.pagination.nextPage": "Ir a la página siguiente",
+  "ui.pagination.previous": "Anterior",
+  "ui.pagination.previousPage": "Ir a la página anterior",
+  "ui.sidebar.description": "Muestra la barra lateral móvil.",
+  "ui.sidebar.title": "Barra lateral",
+  "ui.sidebar.toggle": "Alternar barra lateral",
+  "ui.toast.close": "Cerrar notificación",
+} as const satisfies UiMessageCatalog
diff --git a/packages/ui/src/i18n/locales/fr.ts b/packages/ui/src/i18n/locales/fr.ts
new file mode 100644
index 0000000..8f11a08
--- /dev/null
+++ b/packages/ui/src/i18n/locales/fr.ts
@@ -0,0 +1,25 @@
+export { fr as calendarLocale } from "react-day-picker/locale/fr"
+
+import type { UiMessageCatalog } from "../catalogs"
+
+export const locale = "fr"
+export const languageTag = "fr-FR"
+
+export const messages = {
+  "ui.breadcrumb.label": "Fil d’Ariane",
+  "ui.carousel.nextSlide": "Diapositive suivante",
+  "ui.carousel.previousSlide": "Diapositive précédente",
+  "ui.common.close": "Fermer",
+  "ui.common.loading": "Chargement",
+  "ui.common.more": "Plus",
+  "ui.pagination.label": "Pagination",
+  "ui.pagination.more": "Plus de pages",
+  "ui.pagination.next": "Suivant",
+  "ui.pagination.nextPage": "Aller à la page suivante",
+  "ui.pagination.previous": "Précédent",
+  "ui.pagination.previousPage": "Aller à la page précédente",
+  "ui.sidebar.description": "Affiche la barre latérale mobile.",
+  "ui.sidebar.title": "Barre latérale",
+  "ui.sidebar.toggle": "Afficher ou masquer la barre latérale",
+  "ui.toast.close": "Fermer la notification",
+} as const satisfies UiMessageCatalog
diff --git a/packages/ui/src/i18n/locales/ja.ts b/packages/ui/src/i18n/locales/ja.ts
new file mode 100644
index 0000000..365477d
--- /dev/null
+++ b/packages/ui/src/i18n/locales/ja.ts
@@ -0,0 +1,25 @@
+export { ja as calendarLocale } from "react-day-picker/locale/ja"
+
+import type { UiMessageCatalog } from "../catalogs"
+
+export const locale = "ja"
+export const languageTag = "ja-JP"
+
+export const messages = {
+  "ui.breadcrumb.label": "パンくずリスト",
+  "ui.carousel.nextSlide": "次のスライド",
+  "ui.carousel.previousSlide": "前のスライド",
+  "ui.common.close": "閉じる",
+  "ui.common.loading": "読み込み中",
+  "ui.common.more": "その他",
+  "ui.pagination.label": "ページネーション",
+  "ui.pagination.more": "その他のページ",
+  "ui.pagination.next": "次へ",
+  "ui.pagination.nextPage": "次のページへ移動",
+  "ui.pagination.previous": "前へ",
+  "ui.pagination.previousPage": "前のページへ移動",
+  "ui.sidebar.description": "モバイルサイドバーを表示します。",
+  "ui.sidebar.title": "サイドバー",
+  "ui.sidebar.toggle": "サイドバーを切り替える",
+  "ui.toast.close": "通知を閉じる",
+} as const satisfies UiMessageCatalog
diff --git a/packages/ui/src/i18n/locales/ko.ts b/packages/ui/src/i18n/locales/ko.ts
new file mode 100644
index 0000000..1d0a555
--- /dev/null
+++ b/packages/ui/src/i18n/locales/ko.ts
@@ -0,0 +1,25 @@
+export { ko as calendarLocale } from "react-day-picker/locale/ko"
+
+import type { UiMessageCatalog } from "../catalogs"
+
+export const locale = "ko"
+export const languageTag = "ko-KR"
+
+export const messages = {
+  "ui.breadcrumb.label": "이동 경로",
+  "ui.carousel.nextSlide": "다음 슬라이드",
+  "ui.carousel.previousSlide": "이전 슬라이드",
+  "ui.common.close": "닫기",
+  "ui.common.loading": "불러오는 중",
+  "ui.common.more": "더 보기",
+  "ui.pagination.label": "페이지 탐색",
+  "ui.pagination.more": "더 많은 페이지",
+  "ui.pagination.next": "다음",
+  "ui.pagination.nextPage": "다음 페이지로 이동",
+  "ui.pagination.previous": "이전",
+  "ui.pagination.previousPage": "이전 페이지로 이동",
+  "ui.sidebar.description": "모바일 사이드바를 표시합니다.",
+  "ui.sidebar.title": "사이드바",
+  "ui.sidebar.toggle": "사이드바 전환",
+  "ui.toast.close": "알림 닫기",
+} as const satisfies UiMessageCatalog
diff --git a/packages/ui/src/i18n/locales/zh-Hans.ts b/packages/ui/src/i18n/locales/zh-Hans.ts
new file mode 100644
index 0000000..25de2e9
--- /dev/null
+++ b/packages/ui/src/i18n/locales/zh-Hans.ts
@@ -0,0 +1,25 @@
+export { zhCN as calendarLocale } from "react-day-picker/locale/zh-CN"
+
+import type { UiMessageCatalog } from "../catalogs"
+
+export const locale = "zh-Hans"
+export const languageTag = "zh-CN"
+
+export const messages = {
+  "ui.breadcrumb.label": "面包屑导航",
+  "ui.carousel.nextSlide": "下一张",
+  "ui.carousel.previousSlide": "上一张",
+  "ui.common.close": "关闭",
+  "ui.common.loading": "正在加载",
+  "ui.common.more": "更多",
+  "ui.pagination.label": "分页导航",
+  "ui.pagination.more": "更多页面",
+  "ui.pagination.next": "下一页",
+  "ui.pagination.nextPage": "前往下一页",
+  "ui.pagination.previous": "上一页",
+  "ui.pagination.previousPage": "前往上一页",
+  "ui.sidebar.description": "显示移动端侧栏。",
+  "ui.sidebar.title": "侧栏",
+  "ui.sidebar.toggle": "切换侧栏",
+  "ui.toast.close": "关闭通知",
+} as const satisfies UiMessageCatalog
diff --git a/packages/ui/src/i18n/locales/zh-Hant.ts b/packages/ui/src/i18n/locales/zh-Hant.ts
new file mode 100644
index 0000000..60239ea
--- /dev/null
+++ b/packages/ui/src/i18n/locales/zh-Hant.ts
@@ -0,0 +1,25 @@
+export { zhTW as calendarLocale } from "react-day-picker/locale/zh-TW"
+
+import type { UiMessageCatalog } from "../catalogs"
+
+export const locale = "zh-Hant"
+export const languageTag = "zh-TW"
+
+export const messages = {
+  "ui.breadcrumb.label": "麵包屑導覽",
+  "ui.carousel.nextSlide": "下一張",
+  "ui.carousel.previousSlide": "上一張",
+  "ui.common.close": "關閉",
+  "ui.common.loading": "載入中",
+  "ui.common.more": "更多",
+  "ui.pagination.label": "分頁導覽",
+  "ui.pagination.more": "更多頁面",
+  "ui.pagination.next": "下一頁",
+  "ui.pagination.nextPage": "前往下一頁",
+  "ui.pagination.previous": "上一頁",
+  "ui.pagination.previousPage": "前往上一頁",
+  "ui.sidebar.description": "顯示行動版側欄。",
+  "ui.sidebar.title": "側欄",
+  "ui.sidebar.toggle": "切換側欄",
+  "ui.toast.close": "關閉通知",
+} as const satisfies UiMessageCatalog