| Kwalhioqua–Clatskanie | |
|---|---|
| Kwalhioqua–Tlatskanai | |
| Native to | United States |
| Region | Washington |
| Ethnicity | Kwalhioqua–Clatskanie people |
| Extinct | c. 1910 |
Na-Dené
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| Dialects |
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| Language codes | |
| ISO 639-3 | qwt |
| Glottolog | kwal1258 |
Kwalhioqua–Clatskanie (Kwalhioqua–Tlatskanai, Lower Columbia Athabaskan) is an extinct Athabaskan language of northwest Oregon and southwest Washington state, along the lower Columbia River. It was documented in the early 20th century, and a wordlist was compiled, consisting of some 322 words.
Dialects were:
Kwalhioqua-Clatskanie was likely most closely related to Tsilhqotʼin or Babine-Witsuwitʼen, the latter of which is unique, along with Kwalhioqua-Clatskanie, in having a certain sound change from Proto-Athabaskan.: 48 Other sound changes into Kwalhioqua-Clatskanie are unique in the family, and have helped Michael E. Krauss reconstruct forms for the Proto-Athabaskan fricative series.: 3
Kwalhioqua-Clatskanie had an optional distributive plural according to David Beck. It had a decimal number system, a feature it shared with Athabaskan languages of southern Alaska, Oregon, and California.: 31 Numerals for both dialects (Kwalhioqua and Clatskanie) were collected by Horatio Hale in 1840.: 41