How I Built A $6.5 Billion App Called Duolingo | Founder Effect

The story behind Duolingo's mission - Luis von Ahn, CEO

Duolingo Made A Song..

How to Make Learning as Addictive as Social Media | Duolingo's Luis Von Ahn | TED

How Luis von Ahn created Duolingo and what makes him proudest about the app

A Linguist explains how to make duolingo actually work

I have the HIGHEST Duolingo score... 😎😎😎

Worried about DET vocabulary? Here's the solution!

All Duolingo Widgets I have a Screenshot of!! ⭐️

Genius Founder Created reCAPTCHA & Duolingo (Made $$$)

felt like being nice today #roblox #hopecore #duolingo

How Duolingo Made Learning Fun

I made CaseOh in duolingo (idk why I'm learning Chinese) -idk why-

how Duolingo was made.

Learning to Speak French With Duolingo Made It Easier to Travel - Real Learner Stories

Kids with Duolingo be like

What happens after 365 days on Duolingo?

Playing the Duolingo Roblox game

Introducing Duolingo Push

I made it to the Duolingo DIAMOND LEAGUE! ... #Shorts