The Chinookan languages were spoken at the mouth of the Columbia River. There were a number of dialects of Chinook, only a few of which are possibly still spoken. Lower Chinook is described by UNESCO as critically endangered. Other sources list it as extinct, or almost so.
Other Chinook dialects include: Clatsop (Tlatsop), which was spoken in north west Oregon around the mouth of the Columbia River and the Clatsop Plains; Chinook Jargon; and Shoalwater, or Chinook proper, which was spoken in southwestern Washington State around southern Willapa Bay until the 1930s.
Information provided by Wolfram Siegel
Information about Chinook
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