|Plateau Sign Language|
|Langue des Signes du Plateau|
(in the Canadian province of Québec)
|Native to||Canada, United States|
|Ethnicity||Various First Nations and Native Americans of the Columbia Plateau region|
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.
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