The Kam–Sui branch includes about a dozen languages. Solnit considers Lakkia and Biao languages to be sister branches of Kam–Sui, rather than part of Kam–Sui itself. The best known Kam–Sui languages are Dong, with over a million speakers, Mulam, Maonan, and Sui. Other Kam–Sui languages include Ai-Cham, Mak, and Tʻen, and Chadong, which is the most recently discovered Kam–Sui language. Yang considers Ai-Cham and Mak to be dialects of a single language. Graham Thurgood presents the following tentative classification for the Kam–Sui branch. Chadong, a language that has been described only recently by Chinese linguist Jinfang Li, is also included below. It is most closely related to Maonan. Cao Miao and Naxi Yao, which are closely related to Southern Dong, have also been added from Shi.
**Libo County – Mak and Ai-Cham; 10,000 and 2,700 speakers
Guangxi
*Hechi
**Luocheng County – Mulam; 86,000 speakers
**Huanjiang County – Maonan; 30,000 speakers
*Guilin – Chadong; 20,000 speakers
By population
There is a total of about 2 million Kam–Sui speakers. The four largest Kam–Sui ethnic groups, the Dong, Shui, Mulao, and Maonan, are officially recognized by the Chinese government. Non-recognized Kam–Sui ethnic groups who can still speak their own languages number less than 50,000.
Dong: about 1,500,000 speakers; 1.7 million in 1995
Sui: 300,000 speakers
Mulam: 86,000 speakers
Maonan: 30,000 speakers
Chadong: 20,000 speakers
Then: 15,000 speakers
Mak: 10,000 speakers
Ai-Cham: 2,700 speakers
Other languages
The following language varieties are closely related to, or part of, Southern Dong.
Mjuniang 谬娘 or Cao Miao 草苗 : 60,000 in Liping, Tongdao, and Sanjiang; closely related to Dong. Speakers are classified as ethnic Miao.
Diao 调 : 2,000 in southeastern Guizhou around Liping and Congjiang; may speak Chinese or Dong. Speakers are classified as ethnic Dong. Diao is a Cao Miao subgroup according to Shi.
The Sanqiao language is a mixed language of Miao, Dong, and Chinese origins. Sanqiao 三锹 is spoken by 5,000 people in Liping and Jinping counties, Guizhou. Speakers are classified as either ethnic Miao or Dong. The following peoples may also speak Kam–Sui languages.
Xialusi 下路司: 3,000 in southeastern Guizhou; classified as Dong, but their linguistic affiliation is unknown. Speakers are classified as ethnic Dong.
Shui of Yunnan: 6,800 in Huangnihe 黃泥河 and Gugan 古敢水族乡, Fuyuan County, Yunnan; 490 in Dahe and Long'an of Yiliang County. In Gugan, there is a village cluster known as the "Five Shui Villages" 水五寨, consisting of Buzhang 补掌, Dongla 咚喇, Reshui 热水, Dazhai 大寨, and Duzhang 都章. It is still spoken in Xinbao Village 新堡村, Laochang Township 老厂乡, Fuyuan County, Yunnan. Also in Dacunzi 大村子, Geyi Township 格宜镇, Xuanwei City. However, these are actually all Northern Tai languages according to Hsiu.
There are also some languages in southeastern Guizhou, northern Guangxi, and southwestern Hunan that have been influenced by Kam–Sui languages, such as Suantang 酸汤 and Tongdao Pinghua, a Pinghua lect spoken in Tongdao Dong Autonomous County, Hunan. Kam-Sui languages are also in contact with Suantang 酸汤, a Sinitic language spoken by about 80,000 ethnic Miao in Baibu 白布, Dihu 地湖, Dabaozi 大堡子, and Sanqiao 三锹 in Tianzhu, Huitong, and Jing counties. Suantang is very similar to New Xiang, but is unintelligible with Southwestern Mandarin.
