Duolingo said it just doubled its language courses thanks to AI

Duolingo is revolutionizing language learning by doubling its course offerings to 148 new ones using generative AI and internal tools, making high-quality courses available on multiple platforms for over a billion users globally. By leveraging shared content systems, the company accelerates creation while maintaining rigorous standards—now Spanish, French, German, Italian, Japanese, Korean, and Mandarin are accessible in seven languages beyond English. Additionally, Duolingo is transitioning to an AI-driven model by replacing contract workers with AI capabilities, though some teams have mixed reactions to this shift.