It is actually terminology, he is using the wrong name for something. Yes the word he is using is correct, just not in the context he is using it in. He's talking about the southern part of a continent & naming things, but the word he has used is for the same thing but from the central part of the continent.

ie calling a indigenous medical practitioner from the southern part of the continent the term that is used for the central part of the continent, completely different set of races/tribes from southern to central.