Western Siouan languages
The Western Siouan languages, also called Siouan proper or simply Siouan, are a large language family native to North America. They are closely related to the Catawban languages, sometimes called Eastern Siouan, and together with them constitute the Siouan (Siouan–Catawban) language family.
Taivoan language
The Taivoan language used to be regarded as a dialect of Siraya. However, more evidences have shown that it belongs to an independent language spoken by the Taivoan people.