Calm down, Nihil, we all understand how important this is to you. Just open your mind for a moment and see how ridiculous your arguments are becoming. You bring up Ravel, nope, poor comparison. How about Jan Matejko? Czech father born in Roudnice, his mother half German, half Polish. Didn't master the Polish language either. But he's now "Polish", actually more so because no one really cares about him, and wants to argue the point. Do you? Would calling Matejko a Czech-Polish painter be true or would it upset you?