Baka (also called Be-bayaga, Be-bayaka, and Bibaya de L’est) is a dialect cluster of Ubangian languages spoken by the Baka Pygmies of Cameroon and Gabon. The people are ethnically close to the Aka, the two together called the Mbenga (Bambenga), but the languages are not related apart from some vocabulary dealing with the forest economy, which suggests the Aka may have shifted to Bantu from a language like Baka about 1500 CE. It is unclear if Gundi (Ngundi), Ganzi, and Massa (Limassa), are mutually intelligible with Baka proper. Most Massa have shifted to Gundi, which is spoken by 9,000 people.