The Duolingo Handbook

This isn’t just a handbook…it’s the heart of how we work.

Written originally for employees and interns, the handbook captures the principles, quirks, and inside jokes that define us. It’s a window into our culture, like how we move fast without losing our weird, why “don’t do dumb s**t” became a guiding strategy, and how we build things that are as fun as they are effective.

Now, for the first time, it’s available to everyone. Whether you’re a superfan, curious builder, or just here for the vibe, this is the real story of how we turn ideas into products, chaos into culture, and lessons into laughs.