I have created a nation "Corsica". In order to have players with an Italian surname, I added the Italian language (even with 2%) BEFORE the other languages (even if their importance is much higher). Result: the newgens have Italian surnames. On the other hand, I don't know how to have at the same time first names which are in conformity with the Corsican reality, i.e. either French or Corsican. On this subject, even if you can add new languages in the editor, this has no real influence on the game. I also regret the absence of certain language families or groups. For Brittany, I created the Breton language but the category of Celtic languages (of which Welsh and Irish are part) does not exist.