The Waic languages are spoken in Shan State, Burma, in Northern Thailand and in Yunnan province, China.
Gerard Diffloth reconstructed Proto-Waic in a 1980 paper. His classification is as follows (Sidwell 2009). (Note: Individual languages are highlighted in italics.)
- Samtau (later renamed "Blang" by Diffloth)
- Sidwell, Paul. 2009. Classifying the Austroasiatic languages: history and state of the art. LINCOM studies in Asian linguistics, 76. Munich: Lincom Europa.