Call for papers to be published in the issue “Endangered languages: experiences of revitalizing indigenous languages in Brazil and in the world” of the journal Cadernos de Linguística. Only papers that were presented in the form of oral communication or poster during the international seminar Viva Lingua Viva 2019 will be accepted. Articles ( theoretical studies, case reports, etc) should be between 10 and 15 pages, A4 format, and written in Times New Roman 12pt font, 1.5 line spacing. The deadline for submission is April 30, 2020. The number will be on-line in the second semester of 2020.