Northern Tai languages

The Northern Tai languages are an established branch of the Tai languages of Southeast Asia. They include the northern Zhuang languages and Bouyei of China, Tai Mène of Laos and Yoy of Thailand.

Ethnologue
Ethnologue distinguishes the following languages:

(See varieties of Zhuang.)
 * Saek (Laos and northeast Thailand; listed outside Tai proper in the Ethnologue classification, though said to be similar to Tai Maen, which is listed as Northern Tai)
 * Tai Maen (Laos)
 * Yoy (Thailand) [?]
 * Bouyei (Buyi) (China) (including the language of the Giáy people of Vietnam)
 * Central Hongshuihe Zhuang
 * Eastern Hongshuihe Zhuang
 * Guibei Zhuang
 * Yei Zhuang
 * Lianshan Zhuang
 * Liujiang Zhuang
 * Liuqian Zhuang
 * Yongbei Zhuang
 * Youjiang Zhuang

Yoy is elsewhere classified as Southwestern Tai, and E, which is a mixed language Northern Tai-Chinese language.

Longsang Zhuang, a recently described Northern Tai language, is spoken Longsang Township, Debao County, Guangxi, China. Hezhang Buyi is a moribund Northern Tai language of northwestern Guizhou that is notable for having a Kra substratum.

Pittayaporn (2009)
Pittayaporn (2009:300) distinguishes a similar group of Zhuang varieties as group "N", defined by the phonological shifts *ɯj, *ɯw → *aj, *aw. He moves the prestige dialect of Zhuang, the Wuming dialect, from the Northern Tai Yongbei Zhuang to Yongnan Zhuang – purportedly Central Tai – as it lacks these shifts. The various languages and localities Pittayaporn includes in group N, along with their Ethnologue equivalents, are:


 * Saek
 * Bouyei 布依 (including the language of the Giáy people of Vietnam)
 * Yei Zhuang 剥隘
 * (Wenshan Zhuang and Miao Autonomous Prefecture, Yunnan)
 * Guangnan Sha 广南沙族 = Guibian Zhuang (north Guangnan; south Guangnan is Nong Zhuang)
 * Qiubei 丘北县 = Qiubei Zhuang
 * (Baise, Guangxi)
 * Lingyun 凌乐/凌云县 = Guibian Zhuang
 * Pingguo 平果县 = Yongbei Zhuang
 * Tiandong 田东县 = Youjiang Zhuang
 * Tianlin 田林县 = Guibian Zhuang
 * (Nanning Prefecture, Guangxi)
 * Hengxian 横县 = Yongbei Zhuang
 * Shanglin 上林县 = Hongshuihe Zhuang
 * Yongbei 邕北 = Yongbei Zhuang
 * (Guigang Prefecture, Guangxi)
 * Guigang 贵港 City = Hongshuihe Zhuang ?
 * Dulan 独兰 Village, Pingnan 平南县
 * Laibin 来宾 Prefecture, Guangxi = Hongshuihe Zhuang (south Laibin), Liujiang Zhuang (north Laibin)
 * (Hechi Prefecture, Guangxi)
 * Hechi City 河池 = Guibei Zhuang
 * Huanjiang 环江 = Guibei Zhuang
 * Nandan 南丹县 = Guibei Zhuang
 * Yishan 宜州 = Liujiang Zhuang
 * (Liuzhou Prefecture, Guangxi)
 * Liujiang 柳江县 = Liujiang Zhuang
 * Rong'an 融安县 = Guibei Zhuang
 * Longsheng 龙胜县, Guilin 桂林, Guangxi = Guibei Zhuang
 * Dong'an 东安县, Yongzhou 永州, Hunan
 * Lianshan 连山县, Qingyuan 清远, Guangdong = Lianshan Zhuang

Vocabulary
Some examples of lexical and phonological differences between Northern Tai and Central-Southwestern Tai: