Siouan languages
Siouan languages can be grouped into the Western Siouan languages and Catawban languages. The Western Siouan languages can be divided into Missouri River languages (such as Crow and Hidatsa), Mandan, Mississippi River languages (such as Dakotan, Chiwere-Winnebago, and Dhegihan languages), and Ohio Valley Siouan branches. The Catawban languages consist only of Catawban and Woccon.
Sa'och language
Sa'och (, also, "Sauch") is an endangered, nearly extinct Pearic language of Cambodia and Thailand spoken only occasionally by a decreasing number of older adults. There are two dialects, one spoken in Veal Renh Village, Prey Nob District, Sihanoukville Province (formerly known as Kampong Som Province), Cambodia and the other in Kanchanaburi Province, Thailand. "Sa'och" is the Khmer exonym for the people and the language. The Sa'och, however, consider this label, which means "scarlet fever" or "pimply" in Khmer, pejorative and use the autonym "Chung" () to refer to themselves and their language.