Hard to say. The Mwangi Expanse, the interior region of Garund which conforms to Sub-Saharan Africa, is not very well detailed (in keeping with how most of Africa was a mysterious continent). Only about a third of Garund has actually been covered too. One of the countries, Sargava, is kind of like South Africa (colonized by Chelaxians; Chelaxians are kind of a combination of English/Romans, while their politics and territory are kind of a combination of European fascists (Germany/Italy/Spain) with European imperialists (Rome/Britain/Netherlands; their fascism comes from Asmodeus being the patron deity of the empire, though that only became the case in a succession war about 100 years ago; Sargava broke away from Cheliax during this war, so they are not big on Asmodeus).
The predecessors of the Mwangi people, much like everyone else, had their share of legendary figures and cities (both good and bad). Religion is mostly shamanism, ancestor worship, and of the primary nature god, Gozreh, but there is a lot of demon worship and a few nastier deities as well (like Kitumu the Firefly Goddess and Walkena, a mummified child-god).
What might be a major strike against it though is that one of the major villains in Mwangi is a city of intelligent apes, ape-like creatures, and ape-men called Usaro, which worships an ape demon (Angazhan). What makes it kind of sketchy though is that the ruler, the Gorilla King, is always an intelligent gorilla that was reincarneted from being a human (almost invariably from the demon-worshipping Bekyar tribes).
