Mmm, well, Eos is likely going to be going through quite a reorganization s I last left it - remnants of humanity in the wake of near-destruction of the world, and so on. But prior to the Night -

[And she'll be able to hear that capital, though it likely explains little to nothing.]

- there were four. Lucis, Niflheim, Accordo, and Tenebrae. Save Tenebrae, all were large enough to have provinces with at least somewhat differing culture.