Matthew Dryer has performed research on which Native American language?
Matthew Dryer:  He has done original research on Kutenai and is currently doing research (in conjunction with Lea Brown) on a number of languages of Papua New Guinea, among them Walman. Kutenai language: The Kutenai language ( ), also Kootenai, Kootenay and Ktunaxa, is named after and is spoken by some of the Kutenai people Native American/First Nations, indigenous to the area of North America that is now Montana and Idaho, United States, and British Columbia, Canada.
Kutenai