Crowdin

The Crowdin internationalization project for Minecraft helps us by translating Minecraft into different languages so more people can understand the game.

How to contribute
Before contributing, you should know what language you want to contribute to, and open the project then find if your selected language is listed there.

If your selected language is listed, you can sign up for an account on Crowdin, if you haven't already, and contribute to translating the game into the language.

Translator
If you first joined the project, you will be a translator. As a translator, you can contribute to translating Minecraft by selecting your language, then any subcategory, then translating the word(s)/sentence(s). After typing the word in your own language, you can click "Done" to add it to the list of translated strings.