Which language learning company created the green owl mascot named 'Duo' that has become famous for its persistent reminders and memes about practicing daily?

In the world of language learning products and platforms, mascots often become the face of the brand, helping to create memorable identities in a crowded market. These character ambassadors not only represent the brand but often embody the company's teaching philosophy or approach to language acquisition. Test your knowledge of language learning brand mascots with this challenging question about one of the industry's most recognizable characters!

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Duolingo
Babbel
Rosetta Stone
Memrise