Geographical east, not political East though, Bavaria very heavily uses the German deck. You don’t play Bavarian Schafkopf with a french deck. That’s just weird. I personally also find it weird to play mau mau or Schnautz (Schwimmen) with a French Deck. Doesn’t mean though, that we don’t use the French deck. You don’t play poker or rummy or cribbage for example with German cards. That’s equally as weird.