Siouan languages
Authors who call the entire family "Siouan" distinguish the two branches as "Western Siouan" and "Eastern Siouan" or as "Siouan-proper" and "Catawban". Others restrict the name "Siouan" to the western branch and use the name "Siouan–Catawban" for the entire family. Generally, however, the name "Siouan" is used without distinction.
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.