[Rupert]

Note that Cardiel has a fair number of people who speak Anglish as a second language, and have some Earth language as their native tongue. Also, they use Arabic as their language of scholarship, not Latin.

Bilit Island and other remote parts of the archipelago also speak 'non-standard' languages.

While I agree that languages following political boundaries doesn't make that much sense, especially in the border between Megalos and al-Wazif, I do think that for playability the languages as they are are good enough.