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.
Siraya language
Siraya is a Formosan language spoken until the end of the 19th century by the indigenous Siraya people of Taiwan, derived from Proto-Siraya. Some scholars believe Taivoan and Makatao are two dialects of Siraya, but now more evidence shows that they should be classified as separate languages.