TIPS FOR DUOLINGO DEVELOPERS AND OWNERS
Add more achievements to increase motivations and goals in duolingo, put achievements among followers, put achievements between the amount of time playing, and even increase achievements you already have, also place guilds for greater student confrontation for good and more options than buying with duolingots, make the game more competitive by adding many achievements to make it closer to an addictive game that makes us want to learn and improve even more.
most importantly, enable conversations between players, but with a certain level of word blocking or offensive requests about real name, phone, facebook, among others...
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