Hmong (RPA: Hmoob) or Mong (RPA: Moob), known as Miao in China, is a dialect continuum of the West Hmongic branch of the Miao languages, sometimes known as the Chuanqiandian Cluster, which is spoken by the Hmong people of Sichuan, Yunnan, Guizhou, Guangxi, northern Vietnam, Thailand, and Laos. There are some 2.7 million speakers of varieties which are largely mutually intelligible, including 200,000 Hmong Americans. Over half of all Hmong speakers speak the various dialects of the Chuanqiandian cluster in China, and the Dananshan (大南山) dialect of Chuanqiandian forms the basis of the standard language in China, but Hmong Daw (White Miao) and Mong Njua (Green Miao) are more widely known overseas due to emigration. There are also Hmong immigrants that live in Canada, though not as many as there are in the United States.

Mong Njua and Hmong Daw are part of a dialect cluster known in China as Chuanqiandian Miao, that is, "Sichuan–Guizhou–Yunnan Miao", called the "Chuanqiandian cluster" in English, as Western Hmongic is also called Chuanqiandian (they are distinguished as the Chuanqiandian "subdialect" of the Chuanqiandian "dialect" in Chinese). Mong Njua and Hmong Daw are just those varieties of the cluster which migrated to Laos; the Western names Mong Njua, Mong Leng, Hmong Dleu/Der, and Hmong Daw are also used in China for various dialects of the Chuanqiandian cluster.