East Nusa Tenggara Province. Sumba island, eastern half.
Kambera, Kanatang, Lewa, Mangili-Waijelo (Rindi, Wai Jilu, Waidjelu, Waijelo), Melolo, Southern Sumba, Uma Ratu Nggai (Umbu Ratu Nggai). Dialect network. Kambera dialect is widely understood. Lewa and Uma Ratu Nggai dialects have difficulty understanding those from Mangili.
Christian, traditional religion.