Plateau Sign Language

Plateau Sign Language
Langue des Signes du Plateau
(in the Canadian province of Québec)
Native to Canada, United States
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
  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 shifting instead to Chinook Jargon.

Further reading

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