What is the official language of the place where Regensberg was a family of counts from?
Canton of Zürich The canton of Zürich (German: "Kanton"    ) has a population (as of 31 December 2016 ) of . The canton is located in the northeast of Switzerland and the city of Zürich is the capital of the canton. The official language is German. The local Swiss German dialect called "Züritüütsch" is commonly spoken. In English the name of the canton is often written without an umlaut.
Kingdom of Bohemia The Kingdom of Bohemia, sometimes in English literature referred to as the Czech Kingdom (Czech: "České království" ; German: "Königreich Böhmen" ; Latin: "Regnum Bohemiae" , sometimes Latin: "Regnum Czechorum" ), was a medieval and early modern monarchy in Central Europe, the predecessor of the modern Czech Republic. It was an Imperial State in the Holy Roman Empire, and the Bohemian king was a prince-elector of the empire. The kings of Bohemia, besides Bohemia, ruled also the Lands of the Bohemian Crown, which at various times included Moravia, Silesia, Lusatia and parts of Saxony, Brandenburg and Bavaria.