>>12899017these are somewhat (or more exactly) 'more' secluded areas than others. It's like how you have langage A, and some people take it to a different place and the current languages of the descendants of those people will be (probably) quite different (depending on a lots of factors of course).
Brazil is cut off from the top of SA by a huge rainforest. And communication and travelling of (goods, people, diseases) through Africa vertically was always slow. SA people don't just randomly wander/vacate to the Congo.
I think the english variant is rather just in name, as in that's the place where they first discovered but, it might have 'happened' sooner in a different european country.
