FINALLY. Now I can forget about leagues forever, and get back to actually learning things! Whew. What a week. : r/duolingo

Seriously? What's the point? : r/duolingo

Companies With Bird Logos: The Most Famous Logos With Birds

A thorough Duolingo review after finishing all of French – Snarky Nomad

Did anybody finish a language course on Duolingo? - Quora

Duolingo Plus Gave Fans of Free App a Cost Worth Paying - Bloomberg

5 things about eLearning success we can learn from Duolingo - LMSNinjas

Tales From The Lane – Page 3 of 18 – Living Your Best Life as Creative Artist

New Achievements - Duolingo Forum

Duolingo Turned Me Into a Monster - CNET

Gamification Examples, User Retention

Duolingo (Video Game) - TV Tropes

Duolingo Levels - EVERYTHING You Need To Know - duoplanet

Can you actually learn a language with Duolingo?, by Thierry Maout

How Duolingo reignited user growth - by Jorge Mazal

Analyzing Duolingo from Product Design Perspective after 400 Days Of Non-Stop Practice, by Nare K.