Duolingo is a popular digital platform that helps people learn new languages through short, interactive lessons delivered via a mobile app and website. Founded in 2011 by Luis von Ahn and Severin Hacker, Duolingo uses gamified features—such as streaks, points, levels, and friendly reminders—to make language learning engaging and accessible. The platform offers dozens of language courses and also includes programs for math and literacy, making it one of the most widely used educational apps in the world.