Internationalization — Making Your App Speak Every Language
Implement i18n in your Next.js app with next-intl, content translation, locale routing, and RTL support.
You built an app. It works great. In English. But 75% of internet users don't speak English as their first language, and many don't speak it at all. If your product is going to reach a global audience, you need internationalization (i18n) — the architecture that makes your app translatable.
Internationalization isn't just translation. It's dates that format correctly in every country. Numbers with the right decimal separators. Currencies with the right symbols. Text that reads right-to-left in Arabic and Hebrew. Layouts that don't break when German words are three times longer than their English equivalents.
The good news: if you plan for i18n early, it's straightforward. If you try to retrofit it later, it's painful.
The Terminology
Internationalization (i18n) — The engine
This lesson is part of the Guild Member curriculum. Plans start at $29/mo.