Mumara's interface can be localized into multiple languages. Under Tools → Languages you can see every available language pack, install the ones you need, upload custom translations, and choose the system-wide default.
Each language in the list shows its name, ISO code (e.g. en, fr, zh-CN), author (Mumara for official packs, or the creator's name for custom uploads), and an installation badge — green "INSTALLED" means users can select it in their preferences, gray "NOT INSTALLED" means you click the download icon to fetch it first. For installed languages, the three-dot Actions menu lets you Set as Default, Duplicate the pack to customize a copy without touching the original, Export the files for local editing or backup, or Delete it (not available for the default language). Official packs cover Arabic, Chinese, French, German, Hindi, Italian, Japanese, Korean, Norwegian, Swedish, and more.
The default language (marked with a DEFAULT badge) is used for the login page, new accounts, and as the fallback whenever a user's preferred language or a specific translation string is unavailable. Custom packs are uploaded as ZIP files containing PHP translation files organized under a language-code folder.
Worth knowing: install only the languages your users actually need, clear the application cache if translations don't display after installing, and remember custom edits to official packs can be overwritten on update — duplicate the language first if you plan to customize it.