“The [common trait in] people that we have noticed are best at learning a language is that they have no trouble sounding stupid.” – Luis von Ahn

Luis von Ahn (@luisvonahn) is an entrepreneur and computer science professor at Carnegie Mellon University. He is known for inventing CAPTCHAs, being a MacArthur Fellow (“genius grant” recipient), and selling two companies to Google in his 20’s. Luis has been named one of the 10 Most Brilliant Scientists by Popular Science Magazine, one of the 20 Best Brains Under 40 by Discover, one of the Top Young Innovators Under 35 by MIT Technology Review, and one of the 100 Most Innovative People in Business by FastCompany Magazine.

Luis is currently the co-founder and CEO of Duolingo, a language learning platform created to bring free language education to the world. With more than 100 million users, it is the most popular way to learn languages in the world, and it is the most downloaded app in the Education category on both iTunes (5-star average, 3,300+ reviews) and Google Play.

I first met Luis as an early investor in Duolingo, and every time I meet him, I learn something new.

In this conversation, we talk about:

What 2-3 books and resources he’d recommend to entrepreneurs

Language learning tips

The clever way he caught cheating students at Carnegie Mellon

Early mentors and key lessons learned

The story of building and selling reCAPTCHA

How to recruit and vet technical talent

Duolingo’s most surprising sources of users, and much more…

Enjoy!

You can find the transcript of this episode here. Transcripts of all episodes can be found here.

#135: Luis Von Ahn on Learning Languages, Building Companies, and Changing the World https://rss.art19.com/episodes/5d9f23aa-acd7-4c1b-a960-dd258015305d.mp3 Download

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Want to hear a conversation with an entrepreneur who sold a company for $800 million? Bryan Johnson, the rags to riches philosopher, tells the story of founding Braintree and later selling the company to eBay (stream below or right-click here to download):

#81: The Rags to Riches Philosopher: Bryan Johnson's Path to $800 Million https://rss.art19.com/episodes/985659ec-7f7e-4373-b2bb-3d64dc1a7c74.mp3 Download

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QUESTION(S) OF THE DAY: In this episode, Luis laments that he didn’t get more formal business management training while at Carnegie Mellon. What resource has supported you most to make better management decisions? Please let me know in the comments.

Scroll below for links and show notes…

Selected Links from the Episode

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Show Notes

How Luis von Ahn entrapped cheaters in his class at Carnegie Mellon [6:23]

Where Luis von Ahn grew up, his proclivity for computer science, and transitioning from Guatemala the USA [10:28]

Parenting lessons [14:28]

Strange and effective lessons from Manuel Blum [17:28]

The milestones for CAPTCHA and how the project evolved [21:13]

On technology transfer and intellectual property while attending a university [28:38]

How Luis von Ahn recruits and vets computer science engineers [31:03]

Resources for a bright young entrepreneur [37:48]

The pros and cons of running a tech company [41:48]

When the idea of Duolingo started to germinate [49:33]

Duolingo’s evolving business model [53:03]

The languages available on Duolingo, and why Asian languages aren’t available at the time of recording [1:04:03]

How Duolingo compares to college instruction [1:13:43]

Plans for empowering users to practice conversation skills in-app [1:15:03]

Why Luis von Ahn left Google before his vesting phase was complete [1:19:23]

Optimal usage patterns for those using Duolingo [1:23:38]

The common trait of the people that are best at learning languages [1:27:43]

When you hear the word successful, who is the first person who comes to mind and why? [1:32:03]

Most gifted books or other resources [1:33:18]

Luis von Ahn’s morning run [1:34:43]

Favorite movies or documentaries [1:36:03]

What purchase of $100 or less has most positively affected your life in recent history? [1:37:48]

Bedtime, waking time, and morning habits [1:39:03]

The most important metrics to Luis von Ahn and Duolingo [1:40:23]

Origins of Duolingo’s green owl mascot [1:41:43]

What have you changed your mind about in the last few years and why? [1:48:43]

What is something you believe to be true even though you can’t prove it? [1:53:58]

If you could put one billboard anywhere, with anything on it, where would it be and what would it say? [1:54:23]

Advice to your 20- and 30-year-old self [1:56:08]

An ask of the audience [2:14:53]

People Mentioned

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