Plateau Sign Language

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Plateau Sign Language
Native to Canada, USA
Region Columbia Plateau
Ethnicity Various First Nations and Native Americans of the Columbia Plateau region
Extinct 18th century
contact pidgin
Language codes
ISO 639-3 None (mis)
Glottolog None
US & Canada sign-language map (excl. ASL and LSQ).png
  Attested historical range of Plateau Sign Language among other sign languages in the US and Canada (excl. ASL and LSQ).

Plateau Sign Language, or Old Plateau Sign Language, is a poorly attested, extinct sign language historically used across the Columbian Plateau. The Crow Nation introduced Plains Sign Talk, which replaced Plateau Sign Language among the eastern nations that used it (the Coeur d’Alene, Sanpoil, Okanagan, Thompson, Lakes, Shuswap, and Coleville), with western nations[which?] shifting instead to Chinook Jargon.

Further reading[edit]