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Cultures!
For the most part, its one nation per culture, with some exceptions.
Savan, owing to how there are many kinds of animals in it, have four cultures inhabiting it: the mammal people, the rodents, the birds, and the insects. All with their own language: Ruthenian for the mammals, Japanese for the birds, MesoAm for the insects, and Rodents hopping between English and Japanese.
Polarian language is just straight up English. Notable areas outside Polaria are a sizable part of Canas in Nero Eterna and part of Tempus Rock in Diarnuit.
Speaking of Diarnuit, there's the main divide of the west with its dwarves and the east with its elves.
