Tai languages

: TAI is also an abbreviation for International Atomic Time

The Tai languages are a subgroup of the Tai Kadai language family. The Tai languages include the most widely spoken of the Tai-Kadai languages, including Thai, the national language of Thailand, Lao or Laotian, the national language of Laos, Myanmar's Shan language, and Zhuang, a major language of southern China.
* Central Tai languages (6)
** Southern Zhuang (China)
** E (China)
** Man Cao Lan (Vietnam)
** Nung (Vietnam)
** Tày (Tho) (Vietnam)
** Ts'ün-Lao (Vietnam)
* East Central Tai languages (1)
**Northwest Tai languages (1)
*** Turung (India)
* Northern Tai languages (4)
** Northern Zhuang (China)
** Nhang (Vietnam)
** Bouyei (Buyi) (China)
** Tai Mène (Laos)
* Southwestern Tai languages (32)
** Tai Ya (China)
** East Central Tai languages (10)
*** Chiang Saeng languages (8)
**** Tai Dam (Vietnam)
**** Northern Thai (Lanna, Thai Yuan) (Thailand, Laos)
**** Phuan (Thailand)
**** Thai Song (Thailand)
**** Thai (Thailand)
**** Tai Hang Tong (Vietnam)
**** Tai Dón (Vietnam)
**** Tai Daeng (Vietnam)
**** Tay Tac (Vietnam)
**** Thu Lao (Vietnam)
** Lao-Phutai languages (4)
*** Lao (Laos)
*** Nyaw (Thailand)
*** Phu Thai (Thailand)
*** Isan (Northeastern Thai) (Thailand, Laos)
** Northwestern Tai languages (9)
*** Ahom (India - extinct. Modern Assamese is Indo-European.)
*** Aiton (India)
*** Lü (Lue, Tai Lue) (China, Vietnam, Thailand, Laos, Myanmar)
*** Khamti (India, Myanmar)
*** Khün (Myanmar)
*** Khamyang (India)
*** Phake (India)
*** Shan (Myanmar)
*** Tai Nüa (China, Vietnam, Thailand, Laos)
** Pu Ko (Laos)
**Pa Di (China)
** Southern Tai languages (1)
*** Southern Thai (Pak Thai) (Thailand)
** Tai Thanh (Vietnam)
** Tày Sa Pa (Vietnam)
** Tai Long (Laos)
*** Tai Hongjin (China)
*** Yong (Thailand)
**Unclassified Southwestern
*** Tai Hongjin (China)
*** Yong (Thailand)
* Unclassified (1)
** Kuan (Laos)
* Rien (Laos)
* Tay Khang (Laos)
* Tai Pao (Laos)
* Tai Do (Vietnam)

Reference

*Ethnologue report Retrieved 3 August 2005.