Benin and Belgium civs, as requested ... including genocide Leopold II
???
I must be misunderstanding what you're saying. As far as I can see, there are 38 cultures in the North American Group, and 52 in the European one, while there are 9 in African, and 6 in Oceanic.
So if you start as African or Oceanic civ, you have less cultures available to you until you conquer someone from another culture group.
But Nubia, I think, would make both a good civ, and a good culture.
Oceania:
AUSTRALIA
ABORIGINE
Total: 2
Throw in (for islands):
MAORI
POLYNESIA
total: 2
Nubian is already a culture (ex. BONUS_NUBIAN).
That makes a total of 11 civs. Now how is that a disadvantage, when only 2 are from USA?? (USA and Confederacy) not counting tribes.
May I kindly remind you that USA is not a continent?
There are more North American civs if you also count Canada and some natives like Sioux for example.
I think we should have 4 leaders a Civ, for leader diversity