i18n-frontend-implementer

Install react-i18next or next-intl, create dictionary files like locales/en.json, wrap your app with the IntlProvider, and replace hardcoded strings with the useTranslations hook. Organize keys into namespaces such as common, auth, and errors.

next-intl is tailored for Next.js with server component and routing integration, while react-i18next works across any React setup with a mature plugin ecosystem. Both support namespaced keys, plurals, and locale formatting.

Pass a count parameter to the translation function, such as t('items', { count: 5 }), and define plural variants in the dictionary. The i18n library selects the correct plural form based on the active locale's rules.

Yes, locale-aware formatters handle dates, numbers, and currency using the active locale, for example formatDate(date, { dateStyle: 'long' }). This ensures values render correctly for each language without manual formatting logic.

Set the document direction attribute based on the active locale and use logical CSS properties instead of physical ones. The i18n setup should detect RTL languages like Arabic and switch layout direction automatically.