•
Clatsop (Tlatsop) was spoken in northwestern Oregon around the mouth of the
Columbia River and the
Clatsop Plains (†). •
Shoalwater (also known as Chinook proper), extinct (
†) since the 1930s. Shoalwater was spoken in southwestern Washington around southern
Willapa Bay.
Chinook Jargon is partially based on Chinook. ==Comparison to Kathlamet and Upper Chinook==