i18n Frontend Implementer
Implement internationalization with next-intl, react-i18next, or similar libraries.
Core Setup
1. Install: npm install next-intl or react-i18next
2. Create dictionaries: locales/en.json, locales/es.json
3. Provider setup: Wrap app with IntlProvider
4. Translation keys: Hierarchical namespace structure
5. Formatters: Date, number, currency formatting
6. Language switcher: Dropdown or flags UI
Translation Structure
{
"common": { "nav": { "home": "Home", "about": "About" } },
"auth": { "login": "Sign In", "logout": "Sign Out" },
"errors": { "required": "{field} is required" }
}Usage Examples
const t = useTranslations('common');
<h1>{t('nav.home')}</h1>
// With plurals
t('items', { count: 5 }) // "5 items"
// With formatting
<p>{formatDate(date, { dateStyle: 'long' })}</p>Best Practices
Use namespaces for organization, extract all text to translations, handle plurals properly, format dates/numbers per locale, provide language switcher, support RTL languages, lazy-load translations.