The major cultural divisions of Tedas are marked in the map above. The cultural borders match most of the political borders as well with only a few exceptions.
The border of the Joan Republic (marked in pink on the right continent) and the Rian Collective (the light blue/green on the right continent) have some cross cultural regions. Those regions politically align with the Joan Republic. The same is true with Southern Vaeril (Narah Culture) and it's border with the Trade Company of Boverbe (a Rian Collective Nation).
There is a mixed culture that is part of the United Republic of Vaeril of Narah and Roksha. This cultural blending is a result of a mass exodus of citizens from the Empire of the Roksha at a particularly low point in their government's oppression.