Which famous language learning app was originally created as a side project by its founder to help his Ukrainian girlfriend learn English?

The language learning and linguistic technology market has exploded in the past decade, with innovative apps and tools transforming how we acquire new languages. Many of these companies have fascinating origin stories that reflect their brand positioning and mission. Test your knowledge about the beginnings of a famous language learning brand that revolutionized the industry!

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Duolingo
Babbel
Rosetta Stone
Memrise