- May 3, 2017
You could extend this reasoning to the Swedish (geatish, gutnish, swedish), Latgalian (latgalian, selonian, samogitian, curonian) and Lithuanian (auksatian, samogitian). The Finns and Tavastians would be split up as well, and perhaps Udmurt, Zyriane and Permian, and Moksha and Erzya. I believe those decisions shouldn't be made, since those groups were more so tribes, already represented by the abstracted polities.By the end of the 7th century, clearly defined tribal dialectical areas—Finns, Tavastians, Karelians(Korela), Northern Estonians, Southern Estonians, and Western Estonians including the islanders—had emerged, the population of each having formed its own understanding of identity.
Kvens were not homogeneous, they were Karelians, Tavastians, Satakuntans and other groups. It's not even certain there was such thing as a Kven at the time, it was tied to geography and lifestyle. This also begs the question, which culture would Kvens be, if Karelian was it's own culture from Vyborg to Aunus? Or the people in Savo, which saw settlement from Tavastia and Karelia.If it were my will, I would add Kvens. Once biarmians(Bjarmians) added, what are they worse?
Another thing I would add is that the modern Karelian culture and language has had more time to drift away from Finnish and western Karelian culture. They started settling the coast of Viena during the 14th century, at which point the Karelians got split between Novgorod and Sweden in 1323. Admittedly the western Karelians did get further "westernization" from Sweden and Savonian settlers, but the eastern Karelians absorbed many Saami and Veps people as well. It is not entirely truthful to say that the divergence between modern eastern Karelians and Finns is as big as between ancient Tavastians and ancient Karelians. During the middle ages they were a different group from the Tavastians though, and fought many times according to Russian records, but also were in close contact and shared cultural proximity and heritage.
In conclusion, the Karelian ethnogenesis hadn't fully taken place before late game, nor have the reasons of it occurred yet. It's reasonable to have them as a separate culture from the Finns in EU4. The Karelian culture could perhaps be a late game melting pot, as long as they are under the influence of an Orthodox realm, or otherwise are separated from the Finns.