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.
Sila language (Sino-Tibetan)
Sila (also called Sida) is a Loloish language spoken by 2,000 people in Laos and Vietnam (Bradley 1997). Sila speakers are an officially recognized group in Vietnam, where they are known as the Si La.