We have translations for LibX in a number of languages, the full translations of all terms can be found here. As of 8/15/2015, this includes English, German, French, Italian, Portuguese and Japanese.
Contributing a new language:
To contribute, download the en_US/messages.json file and translate it. Save the file as UTF-8 and send it to email@example.com
To fix issue with existing translations, do the same. The translation files for the supported languages can be found here.
Testing new languages/using a different language:
LibX will use the default locale of the underlying browser. Extensions that can switch that locale should therefore affect the language in which LibX’s user interface is displayed, and this is the only way to do so. For the Chrome browser, instructions on how to switch the locale are here. Note that a restart of the browser is required.