- Language: Saek
- Alternate names: Sek, Tai Sek, Set, 石語
- Language code: skb
- Language family: Tai-Kadai, Kam-Tai, Daic-Beic, Daic, Northern Daic-Sek
- Number of speakers: 10,000
- Vulnerability: Threatened
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.
Saek is spoken in Thailand, Laos, Southeast Asia.