Kupsapiiny, also known as Kuksabin, Kupsabiny, Sabiny, Sapei or Sebei, is a language of Uganda.
It has over 274,000 users in the SKapchorwa, Kween, and Bukwo districts; some in Amudat and Nakapiripirit districts; Kenya border area.
Dialects of Kupsapiiny include; Mbai, Kween (Sor), Kongasis. Mutually intelligible with Sabaot [spy]. Lexically similarity: with Saboat [spy] in Kenya.
Kupsapiiny has 9 vowels, 14 consonants, highly tonal and is taught in primary schools.