The Pacoh language is a member of the Katuic language group, a part of the Eastern [1] Mon–Khmer linguistic branch. Most Pacoh speakers live in central Laos and central Vietnam. Pacoh is undergoing substantial change, influenced by the Vietnamese. Alternative names are Paco, Pokoh, Bo River Van Kieu. Its dialects are Pahi (Ba-Hi). They are officially classified by the Vietnamese government as Ta'Oi (Tà Ôi) people.