Todrah is an Austroasiatic language of Vietnam. The two dialects, Didrah and Modrah, are quite distinct. Speakers are officially classified by the Vietnamese government as Sedang people.
Todrah contrasts clear, breathy and laryngeal vowels.
Todrah (Tơ-đrá, Tơtrá, Hđrá) is spoken in Đắk Glei District, Kon Tum town, and Kon Plông District of Kon Tum Province (Le et al. 2014:175)
According to Ethnologue , it is spoken northeast of Kon Tum city, from Kon Hring to Kon Braih.
The Sán Dìu are a Yao ethnic group in northern Vietnam who speak Yue Chinese (Cantonese), a Chinese language. Although the Vietnamese government classifies San Diu as an independent group, the San Diu people are originally a part of Chinese people in Vietnam. They are believed to have migrated from Guangdong, China around 1600.
The Thổ ethnic group inhabits the mountainous regions of northern Vietnam, mainly Nghệ An Province southwest of Hanoi. Many Thổ speak the Tho language, which is closely related to Vietnamese. The Thổ population numbered 91,430 in 2019.
Halang, also known as Salang, is a Bahnaric language of the Mon–Khmer branch of the Austroasiatic language family. It is spoken in the southern Laotian province of Attapu by approximately 4,000 people and in the neighboring Kon Tum Province of Vietnam by approximately 20,000 people. In Vietnam, Halang is spoken in Đắk Na Commune, Đắk Tô District, Kon Tum Province
The Mnong language belongs to the Austro-Asiatic language family. It is spoken by the different groups of Mnong in Vietnam and a Pnong group in Cambodia.
The Mạ or Maa are a Mon–Khmer-speaking people in Vietnam. They are concentrated mostly in the Lâm Đồng and Đồng Nai province of the country, particularly in the area of the upper Đồng Nai River. There are very close to the Koho people.
Nguồn is a Vietic language spoken by the Nguồn people in the Trường Sơn mountains in Vietnam's North Central Coast region as well as in nearby regions of Laos.
Laghuu is a Loloish language spoken in northwestern Vietnam. In Nậm Sài, Sa Pa Town, the speakers' autonym is, while in Sơn La Province it is. The people are also called the Phù Lá Lão by the Vietnamese.
Bruu is a Mon–Khmer dialect continuum spoken by the Bru people of mainland Southeast Asia.
Chứt or Rục-Sách is a dialect cluster spoken by the Chứt people of Vietnam, with a smaller population of some 450 speakers in neighbouring Khammouane Province, Laos. It is a Vietic language that may be most closely related to Arem.
Dai Zhuang or Thu Lao is a Tai language spoken in Yunnan, China and northern Vietnam. In China is it spoken in Yanshan, Wenshan, Maguan, Malipo, Guangnan counties of Wenshan Prefecture. It is also spoken in Honghe Prefecture. The largest concentrations are in Wenshan and Yanshan counties.
Caolan, sometimes Man Cao Lan, is a Tai language of northern Vietnam. It is spoken by the Cao Lan subgroup of the San Chay people; the Sán Chay proper speak a form of Chinese. According to Pittayaporn (2009), it is closest to the Chongzuo and Shangsi Zhuang across the border in China, both of which are lumped under the apparently polyphyletic Yongnan Zhuang by Ethnologue. Together, Caolan, Chongzuo, and Shangsi form a primary branch of the Tai languages.
Monom (Monam), not to be confused with Bonam, is an Austro-Asiatic language of Vietnam. Speakers are officially classified by the Vietnamese government as Sedang people.
Kayong is an Austro-Asiatic language of Vietnam. Speakers are officially classified by the Vietnamese government as Sedang people.
Pa Di is a Southwestern Tai language of the Chinese–Vietnamese border. There are about 300 Pa Di speakers in Muong Khuong District, Lao Cai Province, Vietnam, who are classified as ethnic Tày by the Vietnamese government. Pa Di tonal splits are similar to those of Standard Thai.
Ná-Meo is a language of northern Vietnam, spoken by the Mieu people. Nguyen (2007) believes Na Meo may be a Hmongic language closest to Qiandong Miao.
Quảng Lâm is an unclassified, poorly attested Austroasiatic language spoken in Quảng Lâm commune, Mường Nhé District, Điện Biên Province, northwestern Vietnam. Nguyễn Văn Huy (1975) is the only published resource contain data of Quang Lam. The Ethnologue lists Quang Lam as an alternate name for Kháng.
Phong or Tày Poọng is a Vietic dialect cluster spoken in north-central Vietnam. Varieties include Đan Lai, Toum, and Liha.
Nguyễn Văn Lợi was a Vietnamese linguist who served as the Deputy Director of the Institute of Linguistics at the Vietnam Academy of Social Sciences.