Languages are not localizable
It's currently not possible to localize languages. Many users are often confused that language labels are only available in one written way and not in a more intuitive and native way. Finally introducing this missing feature helps to predict the general behavior much better on the one hand and also helps to enhance the language commitment. Language variations like e.g. "Bavarian" or "Franconian" could then be represented as "Fränggisch" which is identical to the tradition native from of that language in particular.