Since in OTL, the Bohemians vassalized Silesia, what if the Brandenburgians allied with the Masovian and Kuyavian Piasts and Vassalized them just like what Bohemia did to the Silesian Piasts, assuming that Brandenburg acquires Masovia, Pomerania and Kuyavia once the Masovian Piasts and Griffins get extinct and gets Prussia from the Teutonic Order, what will be the language of this alternate Brandenburg-Prussia