Next.js Internationalization

Next.js is a popular framework for building server-side rendered React applications. It includes built-in support for internationalization (i18n), allowing developers to easily create applications that are accessible to a global audience.

Syntax

The syntax for internationalization in Next.js involves using various components and functions to provide localized content and translations for different languages.

Example

import Link from 'next/link'
import { useRouter } from 'next/router'
import { useTranslation } from 'next-i18next'
import { serverSideTranslations } from 'next-i18next/serverSideTranslations'

function Home() {
  const router = useRouter()
  const { t } = useTranslation('common')

  return (
    <>
      <h1>{t('welcome')}</h1>
      <p>{t('description')}</p>
      <Link href="/" locale={router.locale === 'en-US' ? 'es' : 'en-US'}>
        <a>{t('switch-language')}</a>
      </Link>
    </>
  )
}

export const getStaticProps = async ({ locale }) => ({
  props: {
    ...await serverSideTranslations(locale, ['common']),
  },
})

In this example, we have a simple home page component that uses the useRouter and useTranslation hooks from next-i18next to dynamically render localized content based on the user's preferred language. The serverSideTranslations function is used to pre-fetch translations for the requested locale on the server-side.

Output

The output of this example component would be a home page that renders localized content in either English or Spanish, depending on the selected locale.

Explanation

Next.js provides first-class support for internationalization through the use of the next-i18next library. This library provides React hooks and components for dynamically rendering localized content, as well as server-side rendering translations for improved performance.

Use

Developers can use Next.js internationalization to create web applications that are accessible to a global audience. By providing localized content and translations, developers can improve the user experience for users who speak different languages and reside in different regions.

Important Points

• Developers should carefully consider which locales to support and which translations to provide.

• Translations should be maintained and updated on a regular basis.

• Developers should use tools such as next-i18next to simplify the process of internationalization.

Summary

Next.js provides built-in support for internationalization, allowing developers to create web applications that are accessible to a global audience. By using components and functions provided by the next-i18next library, developers can dynamically render localized content, as well as provide server-side rendered translations for improved performance.