Tyap, or Katab, is a regionally important dialect cluster of Plateau languages in Nigeria, named after its prestige dialect, also known as Morwa. Other dialects are Gworok (Kagoro), Atakar, Kacicere, Sholio, Kafancan. According to Blench (2008), Jju, with an even larger number of speakers, appears to be a Tyap variety, though speakers are ethnically distinct.