Kupsabiny also known as Kuksabin or Kupsapiiny or Sabiny or Sapei or Sebei is a language spoken in Kween District, Kapchorwa District and Bukwo District in Uganda.
It belongs to the Kalenjin group of languages which also includes Keiyo, Kipsigis, Marakwet, Nandi, Pokot, Sabaot, Terik and Tugen languages.
The language has 7 dialects; Kupsapiiny West(Mbai, Tingey), Kupsapiiny East(Kongasis, Sor), Kupsapiiny Central(Kumosop, Kween and Mosop).