Inital Creation short but the most important info should be there
Lang Files can be generated by creating an extension of the File <code>LangurageProvider</code> class. From there you can add the Translations in the <code>addTranslations</code> Method, you must override.
To add a Translation you call the <code>LanguageProvider#add</code> method, this method takes the [[Internationalization|translation key]] and a String which is the displayname for the key.