The Southern Nilotic languages are spoken mainly in western Kenya and northern Tanzania (with one of them, Kupsabiny or Sapiny, being spoken on the Ugandan side of Mount Elgon). They are generally divided into two groups, Kalenjin and Omotik–Datooga, although there is some uncertainty as to the internal coherence of the Kalenjin branch. Southern Nilotic languages appear to have been influenced considerably by Cushitic (Afro-Asiatic) languages.