Internationalization (i18n)
Nuxt UI supports 50+ locales and multi-directional (LTR/RTL) internationalization.
Usage
Locale
Use the locale prop with the locale you want to use from @nuxt/ui/locale:
app.vue
<script setup lang="ts">
import { fr } from '@nuxt/ui/locale'
</script>
<template>
  <UApp :locale="fr">
    <NuxtPage />
  </UApp>
</template>
Custom locale
You can create your own locale using the defineLocale composable:
app.vue
<script setup lang="ts">
import type { Messages } from '@nuxt/ui'
const locale = defineLocale<Messages>({
  name: 'My custom locale',
  code: 'en',
  dir: 'ltr',
  messages: {
    // implement pairs
  }
})
</script>
<template>
  <UApp :locale="locale">
    <NuxtPage />
  </UApp>
</template>
Look at the 
code parameter, there you need to pass the iso code of the language. Example:- hiHindi (language)
- de-AT: German (language) as used in Austria (region)
Extend locale
You can customize an existing locale by overriding its messages or code using the extendLocale composable:
app.vue
<script setup lang="ts">
import { en } from '@nuxt/ui/locale'
const locale = extendLocale(en, {
  code: 'en-GB',
  messages: {
    commandPalette: {
      placeholder: 'Search a component...'
    }
  }
})
</script>
<template>
  <UApp :locale="locale">
    <NuxtPage />
  </UApp>
</template>
Dynamic locale
To dynamically switch between languages, you can use the Nuxt I18n module.
Install the Nuxt I18n package
pnpm add @nuxtjs/i18n
yarn add @nuxtjs/i18n
npm install @nuxtjs/i18n
bun add @nuxtjs/i18n
Add the Nuxt I18n module in your nuxt.config.ts
nuxt.config.ts
export default defineNuxtConfig({
  modules: [
    '@nuxt/ui',
    '@nuxtjs/i18n'
  ],
  css: ['~/assets/css/main.css'],
  i18n: {
    locales: [{
      code: 'de',
      name: 'Deutsch'
    }, {
      code: 'en',
      name: 'English'
    }, {
      code: 'fr',
      name: 'Français'
    }]
  }
})
Set the locale prop using useI18n
app.vue
<script setup lang="ts">
import * as locales from '@nuxt/ui/locale'
const { locale } = useI18n()
</script>
<template>
  <UApp :locale="locales[locale]">
    <NuxtPage />
  </UApp>
</template>
Dynamic direction
Each locale has a dir property which will be used by the App component to set the directionality of all components.
In a multilingual application, you might want to set the lang and dir attributes on the <html> element dynamically based on the user's locale, which you can do with the useHead composable:
app.vue
<script setup lang="ts">
import * as locales from '@nuxt/ui/locale'
const { locale } = useI18n()
const lang = computed(() => locales[locale.value].code)
const dir = computed(() => locales[locale.value].dir)
useHead({
  htmlAttrs: {
    lang,
    dir
  }
})
</script>
<template>
  <UApp :locale="locales[locale]">
    <NuxtPage />
  </UApp>
</template>
Supported languages
 By default, the en locale is used. 
🇸🇦
العربية
Code: 
ar🇦🇿
Azərbaycanca
Code: 
az🇧🇬
Български
Code: 
bg🇧🇩
বাংলা
Code: 
bn🇪🇸
Català
Code: 
ca🇮🇶
کوردی
Code: 
ckb🇨🇿
Čeština
Code: 
cs🇩🇰
Danish
Code: 
da🇩🇪
Deutsch
Code: 
de🇨🇭
Schweizerdeutsch
Code: 
de-CH🇬🇷
Ελληνικά
Code: 
el🇬🇧
English
Code: 
en🇪🇸
Español
Code: 
es🇪🇪
Eesti
Code: 
et🇮🇷
فارسی
Code: 
fa-IR🇫🇮
Suomeksi
Code: 
fi🇫🇷
Français
Code: 
fr🇮🇱
Hebrew
Code: 
he🇮🇳
Hindi
Code: 
hi🇭🇺
Magyar
Code: 
hu🇦🇲
Հայերեն
Code: 
hy🇮🇩
Bahasa Indonesia
Code: 
id🇮🇹
Italiano
Code: 
it🇯🇵
日本語
Code: 
ja🇬🇪
ქართული
Code: 
ka🇰🇿
Қазақша
Code: 
kk🇰🇭
ភាសាខ្មែរ
Code: 
km🇰🇷
한국어
Code: 
ko🇰🇬
Кыргызча
Code: 
ky🇱🇺
Lëtzebuergesch
Code: 
lb🇱🇹
Lietuvių
Code: 
lt🇲🇳
Монгол
Code: 
mn🇲🇾
Melayu
Code: 
ms🇳🇴
Norsk Bokmål
Code: 
nb-NO🇳🇱
Nederlands
Code: 
nl🇵🇱
Polski
Code: 
pl🇵🇹
Português
Code: 
pt🇧🇷
Português (Brasil)
Code: 
pt-BR🇷🇴
Română
Code: 
ro🇷🇺
Русский
Code: 
ru🇸🇰
Slovenčina
Code: 
sk🇸🇮
Slovenščina
Code: 
sl🇸🇪
Svenska
Code: 
sv🇹🇭
ไทย
Code: 
th🇹🇯
Тоҷикӣ
Code: 
tj🇹🇷
Türkçe
Code: 
tr🇨🇳
ئۇيغۇرچە
Code: 
ug-CN🇺🇦
Українська
Code: 
uk🇵🇰
Urdu
Code: 
ur🇺🇿
Oʻzbek
Code: 
uz🇻🇳
Tiếng Việt
Code: 
vi🇨🇳
简体中文
Code: 
zh-CN🇹🇼
繁體中文
Code: 
zh-TW If you need additional languages, you can contribute by creating a PR to add a new locale in 
src/runtime/locale/.  You can use the 
nuxt-ui CLI to create a new locale: nuxt-ui make locale --code "en" --name "English"