I'm seeing quite a few Nigerians becoming prominent in the JavaScript space as well. I didn't realize English was so prevalent there but having a pretty well developed economy and speaking English makes me think there's a lot of good stuff to come from Nigeria.
A lot of African nations speak a decent to very good level of English. My home country of Zimbabwe has one of the highest literacy rates on the continent. I'm not sure about now but I know our education system used to mirror quite closely that of the UK in terms of curriculum, exam material etc.
