The Zhuang languages are any of more than a dozen Tai languages spoken by the Zhuang people of Southern China in the province of Guangxi and adjacent parts of Yunnan and Guangdong. The Zhuang languages do not form a monophyletic linguistic unit, as northern and southern Zhuang languages are more closely related to other Tai languages than to each other. Northern Zhuang languages form a dialect continuum with Northern Tai varieties across the provincial border in Guizhou, which are designated as Bouyei, whereas Southern Zhuang languages form another dialect continuum with Central Tai varieties such as Nung, Tay and Caolan in Vietnam. Standard Zhuang is based on the Northern Zhuang dialect of Wuming. The Tai languages are believed to have been originally spoken in what is now southern China, with speakers of the Southwestern Tai languages having emigrated in the face of Chinese expansion. Noting that both the Zhuang and Thai peoples have the same exonym for the Vietnamese, kɛɛuA1, from the Chinese commandery of Jiaozhi in northern Vietnam, Jerold A. Edmondson posited that the split between Zhuang and the Southwestern Tai languages happened no earlier than the founding of Jiaozhi in 112 BC. He also argues that the departure of the Thai from southern China must predate the 5th century AD, when the Tai who remained in China began to take family names.
Surveys
Zhāng Jūnrú's Zhuàngyǔ Fāngyán Yánjiù is the most detailed study of Zhuang dialectology published to date. It reports survey work carried out in the 1950s, and includes a 1465-word list covering 36 varieties of Zhuang. For the list of the 36 Zhuang variants below from Zhang, the name of the region is given first, followed by the specific village. The phylogenetic position of each variant follows that of Pittayaporn .
The Zhuang language has been divided by Chinese linguists into northern and southern "dialects", each of which has been divided into a number of vernacular varieties by Chinese linguists. The Wuming dialect of Yongbei Zhuang, classified within the "Northern Zhuang dialect," is considered to be the "standard" or prestige dialect of Zhuang, developed by the government for certain official usages. Although Southern Zhuang varieties have aspirated stops, Northern Zhuang varieties lack them. There are over 60 distinct tonal systems with 5–11 tones depending on the variety. Zhang identified 13 Zhuang varieties. Later research by the Summer Institute of Linguistics has indicated that some of these are themselves multiple languages that are not mutually intelligible without previous exposure on the part of speakers, resulting in 16 separate ISO 639-3 codes.
Northern Zhuang
Northern Zhuang comprises dialects north of the Yong River, with 8,572,200 speakers :
Guibian 桂边 : Fengshan, Lingyun, Tianlin, Longlin, Yunnan Guangnan North
Qiubei 丘北 : Yunnan Qiubei area
Lianshan 连山 : Guangdong Lianshan, Huaiji North
Southern Zhuang
Southern Zhuang dialects are spoken south of the Yong River, with 4,232,000 speakers :
Yongnan 邕南 : Yongning South, Fusui Central and North, Long'an, Jinzhou, Shangse, Chongzuo areas
Zuojiang 左江 : Longzhou, Daxin, Tiandeng, Ningming; Zuojiang River basin area
Dejing 得靖 : Jingxi, Debao, Mubian, Napo. Jackson, Jackson and Lau distinguished two mutually unintelligible varieties: Yang and Min
Yanguang 砚广 : Yunnan Guangnan South, Yanshan area
Wenma 文麻 : Yunnan Wenshan, Malipo, Guibian
Tày-Nùng language is also considered one of the varieties of Central Tai and shares a high mutual intelligibility with Wenshan Dai and other Southern Zhuang dialects in Guangxi.
The Zhuang languages have been written in the ancient Zhuang script, Sawndip, for over a thousand years, and possibly Sawgoek previous to that. Sawndip is a Chinese character-based system of writing, similar to Vietnamese chữ nôm; some sawndip logograms were borrowed directly from Han characters, whereas others were original characters created from the components of Chinese characters. It is used for writing songs about every aspect of life, including in more recent times encouraging people to follow official family planning policy. There has also been the occasional use of a number of other scripts including pictographics proto-writing, such as in the example at right. In 1957 Standard Zhuang using a mixed Latin-Cyrillic script was introduced, and in 1982 this was changed to Latin script; these are referred to as the old Zhuang and new Zhuang, respectively. Bouyei is written in Latin script.