Has anyone else tried to get all of the badges in one year? : r/duolingo
Everything You Need to Know About Duolingo Monthly Challenge Badges • Happily Ever Travels
How Duolingo designs product (and why) - by Felix Lee
How to Earn Achievement Badges on Duolingo
Oliver Trosien (inactive) on X: "I really enjoy this monthly themed reward system. Very cute! Happy Anniversary #10yearsduolingo @duolingo https://t.co/CRhPMVPGgv" / X