The Tai–Kadai languages, also known as Daic, Kadai, Kradai, or Kra–Dai, are a language family of highly tonal languages found in southern China and Southeast Asia. They include Thai and Lao, the national languages of Thailand and Laos respectively. There are nearly 100 million speakers of these languages in the world. Ethnologue lists 92 languages in this family, with 76 of these languages being in the Kam–Tai branch.
The diversity of the Tai–Kadai languages in southeastern China, especially in Guizhou and Hainan, suggests that this is close to their homeland. The Tai branch moved south...