It seems that player icons are different from civilization icons.
Mendoza is an Argentinian city, yet the player's jersey is pink and white, and the icon is not the same as the one we saw. Is it even Argentinian?
Here Kashan is an Iranian city, and the player symbol is Persian. Seems consistent.
This is obviously Greece, and the colours match it as well.
This icon suggests Germany, but we can't see the city name, so we can't say for sure
This screenshot is very interesting, and flummoxing as well. The player has a horned icon, and I don't know what it's supposed to represent. There are at least three other factions as well: white-red to the far west, yellow-black to the north, and red-white to the east.
Consider first the player. His colour is green-black, and the capital is Empangeni, a relatively modern city in South Africa which doesn't seem to have roots in Zulu history (as I had previously thought). Together with the jersey colour, this could suggest a South African faction? But the other city is Mamprusi, the name of an ethnic group in Ghana. This is definitely not Ghana, because the colours and icon are different. And why is an ethnic group's name being used for a city? Let us assume this is some weird sort of Pan-African civ. But what of the other faction we saw in an earlier screenshot that had a Ghanaian city? How are Empangeni and Mamprusi more closely related to one another than with Cape Coast?
Also see the capital city of the yellow-black player, Ashanti. Now Ashanti is neither a city nor an ethnic group but the name of an empire. So why is it the name of a city here? If the yellow-black faction is Ashanti, why not use their actual capital Kumasi? And what of the yellow-black icon we saw earlier?
These screenshots raise so many questions. I can't figure out what nations are being represented here, and whether factions have civ-specific colours and icons...