The Kam language can be divided into two major subdivisions: Southern Kam and Northern Kam. Northern Kam displays more Chinese influence and lacks vowel length contrast, while Southern Kam is more conservative. Language varieties closely related to or part of Kam include
Cao Miao and
Naxi Yao. A northern
Pinghua variety called
Tongdao Pinghua, spoken in Tongdao County, Hunan, has also been significantly influenced by Kam. ;Southern Kam •
First lectal area: Róngjiāng Zhānglǔ (), Lípíng Hóngzhōu (), Jǐnpíng Qǐméng () in
Guizhou; Tōngdào () in
Hunan; Longsheng () and Sanjiang Dudong () in
Guangxi •
Second lectal area: Lípíng Shuǐkǒu (), Cóngjiāng Guàndòng (), Róngjiāng Píngjiāng () in
Guizhou; Sānjiāng Hélǐ () in
Guangxi •
Third lectal area: Zhènyuǎn Bàojīng () in
Guizhou •
Fourth lectal area: Róngshuǐ () in
Guangxi ;Northern Kam •
First lectal area: Tiānzhù Shídòng (), Sānsuì Kuǎnchǎng (), Jiànhé Xiǎoguǎng () in
Guizhou; also Jǐnpíng Jiǔzhài () in Guizhou •
Second lectal area: Tiānzhù Zhǔxī () in
Guizhou •
Third lectal area: Jǐnpíng Dàtóng () in
Guizhou Long (2012:19-20) classifies the Kam lectal areas (dialects) as follows. ;Southern Kam •
Lectal area 1 • Chejiang,
Rongjiang County • Longcheng,
Tongdao County • Pingdeng,
Longsheng County • Chengyang,
Sanjiang County • Hongzhou,
Liping County •
Lectal area 2 • Zhaihao,
Rongjiang County • Shuikou,
Liping County • Guidong,
Congjiang County • Heli,
Sanjiang County •
Lectal area 3 • Zhaihuai,
Rongshui County •
Lectal area 4 • Pindong,
Rongshui County ;Northern Kam •
Lectal area 1 (Highland Dong ) • Shidong,
Tianzhu County • Kuanchang,
Sansui County • Jiuzhai,
Jinping County • Xiaoguang,
Jianhe County •
Lectal area 2 (River Dong ) • Datong,
Jinping County • Sanmentang,
Tianzhu County • Lannichong,
Jingzhou County •
Lectal area 3 • Zhuxi,
Tianzhu County • Zhongzhai,
Xinhuang County •
Lectal area 4 • Qimeng,
Jinping County •
Lectal area 5 • Baojing,
Zhenyuan County In
Congjiang County, Dong consists of three dialects:
Jiudong (similar to Chejiang Dong),
Liudong (similar to Liping Dong), and another dialect spoken in Xishan , Bingmei , and Guandong (similar to Sanjiang Dong) (
Congjiang County Gazetteer 1999:109). In
Suining County,
Hunan, Dong is spoken in Lianfeng (including Duolong ), Huangsangping , Le'anpu , and other nearby locations. In
Chengbu County, Hunan, Dong is spoken in Yanzhai , Chang'anying , and Jiangtousi . Kam is also spoken in the single village of Đồng Mộc, Trung Sơn Commune,
Yên Sơn District,
Tuyên Quang Province, northern Vietnam, where there are about 35 Kam people (Edmondson & Gregerson 2001). The Kam of Đồng Mộc had migrated to Vietnam from China about 150 years ago. The Kam variety spoken in Đồng Mộc is most similar to that of Lípíng Shuǐkǒu () in southeastern
Guizhou. In China, a total of seven counties designated as Dong Autonomous Counties (). •
Yuping Dong Autonomous County,
Guizhou •
Sanjiang Dong Autonomous County,
Guangxi •
Longsheng Various Nationalities Autonomous County,
Guangxi •
Xinhuang Dong Autonomous County,
Hunan •
Zhijiang Dong Autonomous County,
Hunan •
Jingzhou Miao and Dong Autonomous County,
Hunan •
Tongdao Dong Autonomous County,
Hunan Others According to the
Shaoyang Prefecture Gazetteer (1997), language varieties closely related to Southern Kam are spoken in Naxi ,
Dongkou County (which had 4,280 ethnic Yao in 1982 (Chen 2013:39)) and Lianmin ,
Suining County. However, they are officially classified by the Chinese government as ethnic
Yao, not
Dong. Chen Qiguang (2013:39) reports that the ancestors of
Naxihua speakers had migrated to their current location from Tianzhu, Liping, and Yuping counties of southeastern Guizhou during the early 15th century. ==Phonology and orthography==