- Language: Southern Roglai
- Alternate names: Rai, Ríoglai, Roglai, Southern
- Language code: rgs
- Language family: Austronesian, Malayo-Polynesian, Malayo-Chamic, Chamic, Highlands, Chru-Northern, Northern Cham (SIL classification)
- Number of speakers: 20,000
- Vulnerability: Vulnerable
Part of the Ra Glai official ethnic community (122,245, 2009 census). Traditional religion.
Southern Roglai is spoken in Vietnam, Southeast Asia.