3,730 (2005 census).
Bolikhamxai province: Khamkeut district, Na Kadok village; Khammouan province: upper Nam Noy and Nam Pheo areas.
Na Kadok, Khammouan. Reportedly similar to Tai Yo [tyj].
The Saek of Na Kadok claim to have come from Phu Quan, Ban Pho Quang, Duc Tho District, in what is now Ha Tinh Province, Viet Nam. Khammouan dialect speakers are originally from Nakai District, and it is still spoken in Toeng, Nam Meo, Na Moey, and Beuk. Traditional religion.