Duolingo doubles its language offerings with AI-built courses

Duolingo launched 148 new language classes that were built by generative AI, the company announced Wednesday.

The move, which more than doubles it current language offering, comes as the gamified learning platform is facing criticism for replacing contract workers with artificial intelligence.

“Developing our first 100 courses took about 12 years, and now, in about a year, we’re able to create and launch nearly 150 new courses. This is a great example of how generative AI can directly benefit our learners,” Duolingo CEO and cofounder Luis von Ahn said in a press release. “This launch reflects the incredible impact of our AI and automation investments, which have allowed us to scale at unprecedented speed and quality.”

As of Wednesday, the language expansion makes the platform’s seven most popular non-English languages—Spanish, French, German, Italian, Japanese, Korean, and Mandarin—available across all supported user interface languages. This means that speakers of languages like Japanese, Hindi, and Mandarin can now learn any of these languages, not just English. According to the company, the new courses will initially focus on beginner levels, with more advanced content to follow in the coming months.

The rapid expansion is part of Duolingo’s bet on artificial intelligence. Von Ahn said in an email to employees and posted to social media on Monday that it was shifting to become an “AI-first” company. That includes phasing out contractors who do work that AI can handle, approving headcount additions if a team can’t automate more of its work, and looking for AI skills when hiring.

“This isn’t about replacing Duos with AI,” von Ahn wrote in the email. “It’s about removing bottlenecks so we can do more with the outstanding Duos we already have. We want you to focus on creative work and real problems, not repetitive tasks. We’re going to support you with more training, mentorship, and tooling for AI in your function.”

Duolingo will likely share more about its mission when it reports first quarter 2025 earnings on Thursday. Shares of the company were up nearly 18% year-to-date on Wednesday afternoon and up 174% from its 2021 market debut.