50,500 (1999 census).
Quang Nam, Thua Thien-Hue, and Da Nang provinces.
None known. Western Katu [kuf] is a different language with a different orthography in Laos.
Also use Vietnamese [vie].
Latin script [Latn].
Part of the Co Tu official ethnic community (61,588, 2009 census) which includes Phuong [phg]. Traditional religion, Christian.