Cele mai bune biblioteci i18n pentru JavaScript
Găsește biblioteca perfectă de internaționalizare pentru framework-ul tău. React, Vue, Angular, Svelte și altele.
@better-i18n/use-intl
Modern React i18n with built-in platform integration
react-i18next
Most popular React i18n library with extensive features
next-intl
Next.js-specific i18n with excellent DX
vue-i18n
Official Vue.js internationalization plugin
svelte-i18n
Lightweight i18n for Svelte applications
ngx-translate
Popular Angular internationalization library
How to choose the right i18n library
Framework fit
Use the library built for your framework. react-i18next for React, next-intl for Next.js App Router, vue-i18n for Vue, ngx-translate for Angular. Framework-native libraries integrate best with server components, SSR, and hydration patterns.
Type safety
For TypeScript projects, prefer libraries with first-class type support. next-intl and @better-i18n/use-intl generate types from your translation files, giving you autocomplete and compile-time safety for translation keys.
Bundle size
Lightweight matters for client-side apps. svelte-i18n and basic i18next configurations are small. next-intl with RSC only loads translations for the current locale. Better i18n CDN delivery means zero translation data in your JS bundle.
Pluralization needs
If you target languages with complex plural rules (Arabic, Polish, Russian), use a library with full ICU MessageFormat support: i18next with the ICU plugin, next-intl, or @better-i18n/use-intl. All support CLDR-compliant plural forms.
Translation management
Libraries only handle runtime rendering. For managing translations at scale — AI translation, team review, CDN delivery — you need a TMS alongside the library. Better i18n integrates with all major i18n libraries via the CLI.
OTA updates
If you need to push translation corrections without a new deployment, choose a library with runtime loading support. Better i18n delivers translations via CDN with 60-second cache max-age, enabling near-instant updates for web and mobile apps.
Frequently Asked Questions
What is the most popular i18n library for React?
react-i18next is the most widely used React i18n library, with over 9 million weekly npm downloads. It's built on i18next and supports namespaces, pluralization, interpolation, and lazy loading. For Next.js specifically, next-intl has become the leading choice due to its first-class App Router and Server Components support.
Should I use an i18n library or build my own?
Almost always use an established library. Building your own i18n solution seems simple but quickly becomes complex: you need pluralization rules for every language (Arabic has 6 plural forms), ICU message parsing, number and date formatting, RTL support, and SSR hydration. Established libraries like i18next have millions of hours of testing across edge cases you haven't thought of yet.
What is the difference between i18n libraries and a TMS?
An i18n library handles runtime translation — it takes a key like 'welcome.title' and returns the translated string for the active locale. A Translation Management System (TMS) like Better i18n handles the workflow: storing translations, AI-assisted translation, team review, CDN delivery, and CI/CD sync. You need both: the library for rendering and the TMS for managing translation content.
Does Better i18n work with react-i18next?
Yes. Better i18n integrates with react-i18next via the @better-i18n/expo package for React Native, or by configuring react-i18next's backend to load from the Better i18n CDN. The Better i18n CLI syncs your i18next JSON translation files with the dashboard. This gives you react-i18next's mature runtime with Better i18n's managed translation workflow.
How do i18n libraries handle missing translations?
Most libraries fall back to a specified fallback locale (usually the source language) when a translation is missing. react-i18next and i18next log missing keys in development mode. next-intl throws errors for missing keys in development and silently falls back in production. Better i18n's dashboard shows translation coverage per language, so you can ensure 100% coverage before deploying.