Bronze League Duolingo by DuyHuynh on DeviantArt

How Duolingo Leaderboards and Leagues Work

Duolingo Emerald League, Amethyst League, Pearl League and Obsidian League: my advancement, Duolingo Leagues is a great challenge and it motivates me a lot #duolingoaddict, #duolingoleagues

Duolingo Leagues - What are they and how do they work?

How I won The Diamond League on Duolingo on the first day!!

How Duolingo's new gamification mechanism convinced me to pay, by Shengyu Chen

An unnecessary fight to the end

Duolingo Diamond League

How to win Diamond League in Duolingo! – Clark Dever

Software compatible with videohive template - Envato Forums

Ruby league: Is it worth the grind? : r/duolingo