This podcast episode tells the story of Luis von Ahn, the creator of ReCaptcha and the founder of Duolingo. It explores his background, his journey from selling his company to Google to starting Duolingo, and the success of the language learning app. The episode also discusses Duolingo's revenue streams and the introduction of the Duolingo English Test. Additionally, it covers the acceptance of the test by universities, the importance of accent in language communication, and the values considered during the hiring process at Duolingo. The episode concludes with a conversation about management and career growth, recommending a book called High Output Management for practical insights.