https://news.elearninginside.com/duolingos-bid-to-help-dying-languages-flourish-in-a-digital-world/ The more than 2,000 endangered languages should keep Johann busy.
It's a great effort. We once had a micro discussion about it here https://www.degreeinfo.com/index.php?threads/less-commonly-taught-languages.47700/#post-473542
They mention Diné (Navajo) The only Navajo words I know I learned from Tony Hillerman books. At least I know what a kinaalda cake is and how it's made. I read that the Navajo people migrated from Northern Canada. A large First Nation there is still known as Dené. "I say Dené, you say Diné, let's call the whole thing off." Yep - Wiki agrees: "the Navajos and Apaches are believed to have migrated from northwestern Canada and eastern Alaska, where the majority of Athabaskan speakers reside..." Only North American Native language I ever took a course in was Mohawk, a bunch of years ago. Later, course funding dried up - only available for languages with less than 1,500 speakers and I didn't want to switch to Cayuga.
a related story . . . https://www.msn.com/en-ca/news/canada/saving-a-dying-language-stories-of-some-hopeful-rescuers/ar-AADgwI5
Interesting! My mom is part Wabanaki, although so many generations removed that it doesn't show much. Her father had a permanent tan, but that's about it.