I just watched a PBS documentary called Language Matters with Bob Holman (2015), about endangered languages and efforts to revitalize them. It focuses on the Aboriginal languages of the Goulburn Islands off the northern coast of Australia, which have very few remaining speakers (and some of which are already extinct), as well as Welsh and Hawaiian, both of which have made a resurgence in the past half-century.
Welsh and Hawaiian are both high on my list of languages that I wish I could speak. I took two semesters of Medieval Welsh when I was 19, 20 years old (i.e. when Medieval Welsh was what they still spoke in Wales), so I could still recognize some of the words that people were saying in the documentary -- more than I expected, actually. But I was definitely inspired to refresh my knowledge of the language.
Western Armenian, the first language of my maternal grandparents, is on UNESCO's list of "definitely endangered" languages. I truly wish that I had learned it as a child. If my mother hadn't passed away when I was so young (6½), I might have had more of an opportunity to do so.
TOO MANY LANGUAGES TO LEARN, TOO LITTLE TIME!!!