Dozens of amateur and professional linguists filled the Robert Henderson Language Media Center in the Cathedral of Learning Wednesday afternoon to participate in an “Indigenous Languages Wikipedia Edit-a-thon.” At the edit-a-thon, participants learned how to edit articles on the online encyclopedia to help fill the online information gap in respect to indigenous languages.

Pittsburgh-based education software company Duolingo is most popular for teaching foreign languages to millions of people worldwide through its phone app and online learning program. But the company’s...