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.
Lakota people
The Lakota (pronounced , Lakota language: Lakȟóta) are a Native American tribe. Also known as the Teton Sioux (from "Thítȟuŋwaŋ"), they are one of the three Sioux tribes of Plains. Their current lands are in North and South Dakota. They speak "Lakȟótiyapi"—the Lakota language, the westernmost of three closely related languages that belong to the Siouan language family.