Idaho, and Washington Sinkayuse Sinkiuse-Columbia, Washington (extinct) Spokane people, Washington St'at'imc, British Columbia (Upper Lillooet) Wenatchi (Wenatchee) Sahaptin people Upper Cowlitz or Taidnapam Kittitas (Upper Yakima) Klickitat Tribe, Washington Lower Snake people: Chamnapam, Wauyukma, Naxiyampam Nez Perce, Idaho Palus (Palouse), Idaho, Oregon, and Washington Pshwanwapam (Pswanwapam) Skinpah (Skin) Tenino (Warmsprings) Tygh (Upper Deschutes), Oregon Umatilla, Oregon Walla Walla, Washington Wanapum, Washington Wauyukma Wyam (Lower Deschutes) Yakama, Washington Other or multiple Cayuse, Oregon Celilo (Wayampam) Cowlitz, Washington Klamath, Oregon Kalapuya, northwest Oregon Atfalati (Tualatin, northwest Oregon) Mohawk River, northwest Oregon Santiam, northwest Oregon Yaquina, northwest Oregon Kutenai (Kootenai, Ktunaxa), British Columbia, Idaho, and Montana Modoc, California and Oregon, now also Oklahoma Molala (Molale), Oregon Nicola Athapaskans (extinct), British Columbia Upper Nisqually (Mishalpan) Languages Plateau tribes primarily spoke Interior Salish languages in the north and Plateau Penutian languages in the south. Chinookan languages were spoken on the lower Columbia and Kalapuyan languages were spoken in the Willamette valley. These are often classified as Penutian languages, but this classification is not universally agreed upon. In the northernmost portion of the plateau Athabaskan languages were spoken. Each of these language families consisted of multiple languages that were not mutually intelligible. Many of the individual languages had several dialects with significant differences. The Ktunaxa speak the Kutenai language, which is a language isolate. The Cayuse language died out shortly after European contact and is poorly documented. It is sometimes called an isolate, and sometimes classified as Penutian, most closely related to the Molala language. Even before relocation onto reservations, many Cayuse had adopted the Nez Perce language. Material culture Diet Traditional Plateau cuisine include wild plants, fish, especially salmon, and game. Plateau peoples often had seasonal villages or encampment in different areas to take full advantage of the wild foods. Women gathered a large variety of edible vegetables and fruits, including camassia, bitterroot, kouse root, serviceberry, chokecherry, huckleberry, and wild strawberry. Camas lily bulbs were an important but dangerous staple. Common camas, camassia quamash, is a plant in the lily family with blue flowers, whose bulbs were dug for food. The white flowering death camas, zygadenus venenosus, is a different but related species also in the lily family, and can be deadly poisonous. For safety reasons, Plateau peoples gathered these bulbs while aerial parts were still growing in order to correctly identify the edible species. They dug these bulbs with deer antlers. Women in the