Wait, are you saying that it is wrong for France have a French culture and Germany have a German culture and they should all be European? Because if there’s one thing that clearly defines a culture is the concept of nationalism. I can see Belgium having 2/3 cultures because it’s a country that has 3 different languages spoken in it, same for the Switzerland. Now, if you are arguing that, say, Italy should have a single Italian culture instead of, say, Sicilians, Romans and Alpine-Italians or what have you. I agree, they should have a single culture. Because, in my humble opinion, for the stuff this game needs, culture should be only based on language and the sense of national identity. (If paradox would even track melting pot and create hybrid cultures of immigrants, that would be neat but I see it more like a “could have” feature than a “must have”.)