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.
Sion, Switzerland
Most of the population () speaks French (22,338 or 82.2%) as their first language, German is the second most common (1,523 or 5.6%) and Portuguese is the third (912 or 3.4%). There are 855 people who speak Italian and 19 people who speak Romansh.