Pretty much the entirety of manking is really under the umbrella of celtic/english/french/german like language + the scandinavian one for the nordern nations.

I do propose to put some nations that have an Italian/greek/spanish vibe too, maybe you could say that they are the remnants of an ancient empire existed long ago in the islands between the two major continents (eastern and western) continents.

While certain islands will have such nations, some other islands will remain completely colonizable though with ruins of that ancient empire, maybe events connected to such, dunno.

What you think?