Internationalization for Next.js that gets out of your way.

Support multiple languages, with your app code becoming simpler instead of more complex.

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📣 Support for Next.js 13 and the app directory is coming →
import {useTranslations, useIntl} from 'next-intl'; function UserDetails({user}) {  const t = useTranslations('UserDetails');  const intl = useIntl();   return (    <section>      <h2>{t('title')}</h2>      <p>{t('followers', {count: user.followers.length})}</p>      <p>{t('lastSeen', {time: intl.formatRelativeTime(user.lastSeen)})</p>      <Image alt={t('portrait', {username: user.name})} src={user.portrait} />    </section>  );}

Minimalistic, yet complete

Internationalization is an essential part of the user experience. next-intl gives you everything you need to get language subtleties right and has always got your back whenever you need to fine-tune a translation.
{  "UserDetails": {    "title": "User details",    "followers": "{count, plural, ↵                    =0 {No followers yet} ↵                    =1 {One follower} ↵                    other {# followers} ↵                  }",

ICU message syntax

Localize your messages with interpolation, plurals, ordinal pluralization, enum-based label selection, and rich text.

// "Feb 28, 2023"intl.formatDateTime(lastSeen, 'medium'); // "2 hours ago"intl.formatRelativeTime(lastSeen); // "$1,499.90"intl.formatNumber(1499.9, {style: 'currency', currency: 'USD'});

Dates, times & numbers

Use global formats for a consistent look & feel of your app and apply fine-tuning as necessary.

Found 1 error in UserDetails.tsx:13   <h1>{t('titel')}</h1>         ~~~~~~~ Argument of type "titel" is not assignableto parameter of type "title" | "description".

Type-safe

Speed up development with autocompletion for message keys and catch typos early with compile-time checks.

const t = useTranslations('UserDetails');t('title'); // stringt.rich('bio'); // ReactNode const intl = useIntl();const timeZone = useTimeZone();const locale = useLocale();const now = useNow();

Hooks-only API

Learn a single API that can be used across your code base, from components accepting children to string attributes.

$ next build Route (pages)   Size     First Load JS┌ ● /           637 B    90.1 kB├ ● /about      512 B    92.5 kB└ ● /contact    931 B    91.2 kB ● (SSG) automatically generated as static HTML + JSON

Fast

Get the best performance from your app by supporting internationalization on both static and dynamic pages.

Intl.LocaleIntl.DateTimeFormatIntl.NumberFormatIntl.PluralRulesIntl.RelativeTimeFormat IntlMessageformat

Standards-based

Use the best parts of built-in JavaScript APIs and supplemental lower-level APIs from Format.JS.

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Usage guideExamples