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ui/docs/content/1.getting-started/7.i18n/2.vue.md
Alex a9c8eb3f60 feat(useLocale): handle generic messages (#3100)
Co-authored-by: hywax <me@hywax.space>
Co-authored-by: Benjamin Canac <canacb1@gmail.com>
2025-03-10 18:37:28 +01:00

5.1 KiB

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Internationalization (i18n) Learn how to internationalize your Vue app with multi-directional support (LTR/RTL). vue i-lucide-languages

::callout{to="/getting-started/i18n/nuxt" icon="i-logos-nuxt-icon" class="hidden"} Looking for the Nuxt version? ::

Usage

::note{to="/components/app"} Nuxt UI provides an App component that wraps your app to provide global configurations. ::

Locale

::module-only

#ui :::div

Use the locale prop with the locale you want to use from @nuxt/ui/locale:

<script setup lang="ts">
import { fr } from '@nuxt/ui/locale'
</script>

<template>
  <UApp :locale="fr">
    <RouterView />
  </UApp>
</template>

:::

#ui-pro :::div

Use the locale prop with the locale you want to use from @nuxt/ui-pro/locale:

<script setup lang="ts">
import { fr } from '@nuxt/ui-pro/locale'
</script>

<template>
  <UApp :locale="fr">
    <RouterView />
  </UApp>
</template>

::: ::

Custom locale

You also have the option to add your locale using defineLocale:

::module-only

#ui :::div

<script setup lang="ts">
import type { Messages } from '@nuxt/ui'
import { defineLocale } from '@nuxt/ui/composables/defineLocale.js'

const locale = defineLocale<Messages>({
  name: 'My custom locale',
  code: 'en',
  dir: 'ltr',
  messages: {
    // implement pairs
  }
})
</script>

<template>
  <UApp :locale="locale">
    <RouterView />
  </UApp>
</template>

:::

#ui-pro :::div

<script setup lang="ts">
import type { Messages } from '@nuxt/ui-pro'
import { defineLocale } from '@nuxt/ui/composables/defineLocale.js'

const locale = defineLocale<Messages>({
  name: 'My custom locale',
  code: 'en',
  dir: 'ltr',
  messages: {
    // implement pairs
  }
})
</script>

<template>
  <UApp :locale="locale">
    <RouterView />
  </UApp>
</template>

::: ::

::tip Look at the code parameter, there you need to pass the iso code of the language. Example:

  • hi Hindi (language)
  • de-AT: German (language) as used in Austria (region)

::

Dynamic locale

To dynamically switch between languages, you can use the Vue I18n plugin.

::steps{level="4"}

Install the Vue I18n package

::code-group{sync="pm"}

pnpm add vue-i18n@10
yarn add vue-i18n@10
npm install vue-i18n@10
bun add vue-i18n@10

::

Use the Vue I18n plugin in your main.ts

import { createApp } from 'vue'
import { createRouter, createWebHistory } from 'vue-router'
import { createI18n } from 'vue-i18n'
import ui from '@nuxt/ui/vue-plugin'
import App from './App.vue'

const app = createApp(App)

const router = createRouter({
  routes: [],
  history: createWebHistory()
})

const i18n = createI18n({
  legacy: false,
  locale: 'en',
  availableLocales: ['en', 'de'],
  messages: {
    en: {
      // ...
    },
    de: {
      // ...
    }
  }
})

app.use(router)
app.use(i18n)
app.use(ui)

app.mount('#app')

Set the locale prop using useI18n

::module-only

#ui :::div

<script setup lang="ts">
import { useI18n } from 'vue-i18n'
import * as locales from '@nuxt/ui/locale'

const { locale } = useI18n()
</script>

<template>
  <UApp :locale="locales[locale]">
    <RouterView />
  </UApp>
</template>

:::

#ui-pro :::div

<script setup lang="ts">
import { useI18n } from 'vue-i18n'
import * as locales from '@nuxt/ui-pro/locale'

const { locale } = useI18n()
</script>

<template>
  <UApp :locale="locales[locale]">
    <RouterView />
  </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:

::module-only

#ui :::div

<script setup lang="ts">
import { computed } from 'vue'
import { useI18n } from 'vue-i18n'
import { useHead } from '@unhead/vue'
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]">
    <RouterView />
  </UApp>
</template>

:::

#ui-pro :::div

<script setup lang="ts">
import { computed } from 'vue'
import { useI18n } from 'vue-i18n'
import { useHead } from '@unhead/vue'
import * as locales from '@nuxt/ui-pro/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]">
    <RouterView />
  </UApp>
</template>

::: ::

Supported languages

:supported-languages