- Language: Kasong
- Alternate names: Song, Chong of Trat
- Language code: 1l3
- Language family:
Austro-Asiatic; Pearic; Central Chong
- Number of speakers: 40
- Vulnerability: Endangered
Distinct language often confused with Chong (cog). Some consider it a dialect of Suoy. Also Song (1l3) of Mon-Khmer is different from Song (soa) of Tai-Kadai though both of them are spoken in Thailand.