I agree. In no way are “black” and “white” strictly Americanisms exported to the rest of the world. As an example, in Zimbabwe and South Africa “black” and “white” are most definitely things and they are things with little or no help from the U.S. at all.
I don’t know about the entirety of the African continent but I think blame for that can be apportioned to the Dutch, English, and French more than anyone else.
