Duolingo Expands Language Course Offerings with AI Integration

Duolingo is "more than doubling" its course offerings, a milestone it attributes to leveraging generative AI to develop them in "under a year."

The company announced today the launch of 148 new language courses. "This expansion makes Duolingo's seven most popular non-English languages – Spanish, French, German, Italian, Japanese, Korean, and Mandarin – accessible across all 28 supported interface languages. This significantly broadens learning opportunities for over a billion potential users worldwide," the company stated.

Historically, developing a single new course took "years," according to Duolingo. The company accelerated the creation of this new suite by utilizing "advances in generative AI, shared content systems, and internal tools." This internal "shared content" approach allows teams to build a foundational course and efficiently customize it for "dozens" of different languages.

"Now, by employing generative AI for content creation and validation, we can concentrate our expertise where it matters most, ensuring every course meets Duolingo's rigorous quality standards," said Jessie Becker, Duolingo's senior director of learning design.

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• Duolingo will replace contract workers with AI

This announcement follows a recent memo from co-founder and CEO Luis von Ahn, informing staff of the company's shift to an "AI-first" approach. The memo indicated a gradual phase-out of contractors for tasks AI can handle. AI utilization will now factor into hiring and performance reviews, with von Ahn noting that "headcount will only be approved if a team cannot further automate their work."

"Our vision has always been to use technology to teach as effectively as a human tutor. With AI, that goal is finally within reach," spokesperson Sam Dalsimer told The Verge in response to questions about the memo. "We've been moving in this direction, and it's been transformative. A key recent decision was replacing a slow, manual content process with an AI-powered one, guided by our learning experts. This shift enabled us to create and launch 148 new language courses today."

Dalsimer emphasized that Duolingo has been "using and testing AI for years" and would not implement this new content or strategy without confidence in the technology. The company is "constantly testing and improving our models" and has "systems in place" to ensure AI-generated content meets its quality standards and aligns with the Common European Framework of Reference for Languages.

"Internally, many teams have already been embracing and using AI in their work for years," Dalsimer added. He acknowledged some "negative reactions" to von Ahn's memo but clarified that Duolingo has "no intention to reduce full-time headcount or hiring" and that "any changes to contractor staffing will be evaluated on a case-by-case basis."