Duolingo expande serviços e lança a campanha "falar inglês não custa"
Amazon.com: Duolingo
Duo Plushie - Duolingo Store
Duolingo on Twitter: "Ever had the feeling you get better at languages when you're drinking? It's not just you, it's science. Introducing Brewolingo: https://t.co/aXqDammic0 https://t.co/ZvopAPhvFP" / Twitter