Nuxt i18n module takes advantage of Vue I18n ability to handle localization fallback. It is possible to define a single fallback locale, an array of locales, or a decision map for more specific needs.
export default {
fallbackLocale: 'en',
// or
fallbackLocale: ['en', 'fr'],
// or
fallbackLocale: {
'de-CH': ['fr', 'it'],
'zh-Hant': ['zh-Hans'],
'es-CL': ['es-AR'],
es: ['en-GB'],
pt: ['es-AR'],
default: ['en', 'da']
}
// ...
}
More information in Vue I18n documentation