Which language learning app famously used the tagline "Make language learning a game" and pioneered gamification with its owl mascot Duo?

Test your knowledge about famous language learning and linguistics technology brands! The language learning app market has grown exponentially in recent years, with several companies becoming household names through innovative marketing and product design. This question explores how well you recognize the brand stories behind these linguistic powerhouses that have revolutionized how millions learn languages worldwide.

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Duolingo
Babbel
Rosetta Stone
Memrise