Which language learning app famously launched with the slogan 'The free language education for all' and initially focused on just teaching basic vocabulary and grammar through gamification?

The language learning app market has seen tremendous growth with companies employing various launch strategies to stand out in a crowded marketplace. Different apps have used distinctive approaches to announce their arrival, from celebrity endorsements to unique marketing campaigns. Test your knowledge of how popular language learning platforms made their initial splash in the market!

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Duolingo
Babbel
Rosetta Stone
Memrise