That's a slippery slope... The Aztec Empire is as pagan as can be, but not called Ēxcān Tlahtōlōyān in-game. I think it's safe to admit that Paradox is wildly inconsistent regarding endonyms and exonyms :|Catholic Sweden is Sweden, not Svea Rike. Hence Catholic Germany should be Germany, not Deutschland. If Germany was pagan, it would make sense to have it as Deutschland