Duolingo - For those feeling extra competitive, we've added 5 brand-new leagues to our Leaderboard! Leagues previously went up to Ruby, but now you can advance to even higher ones. Do you
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What Are The Leagues in Duolingo? Gamified Language Learning
How Duolingo keeps learning fun
Why are my friends getting to ruby with 200xp rankings and i get
Why didn't I progress to the next league if I came #1? : r/duolingo
How effective is Duolingo in learning a language? - Quora
Can you actually learn a language with Duolingo?
Just another example of how the competition in the leagues is
So I returned to Duolingo after a year and these are the scores
Duolingo Leagues & Leaderboards - EVERYTHING You Need To Know
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por adulto (o preço varia de acordo com o tamanho do grupo)