Vertimas - Anglų-Vokiečių - You've asked for a translation

%a and %b must be kept unchanged, they are names of languages

In German, just like in Latin, the nouns have different "cases" (don't know how to say it in English correctly). So if I would imitate the grammer of the original text in this translation, I couldn't guarantee that it's always a correct sentence because of the irregular nouns.