L1 users: 2,130 (CIP-EY 2002). Ethnic population: 2,130.
Chiayi county: Alishan (Mt. Ali) area; Kaohsiung county: northwest and central; Nantou county: south central.
Duhtu, Luhtu, Tapangu, Tfuea, Iimutsu.
Iimutsu has no remaining speakers (Wurm and Hattori 1981). Many speak Tsou in daily life. Youth speak Mandarin.
Latin script [Latn].
Some linguistic work done.