Havasupai is a dialect of the Upland Yuman language spoken by about 450 people on the Havasupai Indian Reservation in and around the Grand Canyon. It is the only Native American language in the United States spoken by 100% of its indigenous population. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.