Arunachal Pradesh can be roughly divided into a set of semi-distinct cultural spheres, on the basis of tribal identity, language, religion and material culture: the Tibetic-speaking Monpa area bordering Bhutan in the west, the Tani area in the centre of the state, the Mishmi area to the east of the Tani area, the Tai/Singpho/Tangsa area bordering Myanmar, and the Naga area to the south, which also borders Myanmar. In between there are transition zones, such as the Aka/Hruso/Miji/Sherdukpen area, between the Tibetan Buddhist tribes and the animist Tani hill tribes. In addition, there are isolated peoples scattered throughout the state, such as the Sulung.