Which language learning platform famously rebranded with a minimalist green owl logo in 2012, leading to a 400% increase in active users within one year?

In the world of language learning apps and platforms, branding plays a crucial role in market success. Distinctive logos, memorable names, and clever taglines can make or break a language product. This poll tests your knowledge about a revolutionary branding decision that changed how we interact with language learning tools. Can you identify the correct linguistic product branding fact from the options below?

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Duolingo - whose mascot 'Duo' became one of the most recognizable educational brand symbols in digital learning
Babbel - whose simplified owl design represented wisdom and accessibility in language acquisition
Rosetta Stone - whose transition from ancient tablet imagery to a modern owl increased youth engagement
Memrise - whose 'Memmo' owl character drove their mobile app downloads to record numbers