Which language learning app's mascot became so recognizable that the company successfully trademarked the character's specific shade of green as part of their brand identity?

The language learning app market has exploded in the past decade, with distinctive branding strategies helping certain products stand out in a crowded marketplace. Each company employs unique visual elements, sounds, and mascots that have become instantly recognizable to millions of users worldwide. This poll tests your knowledge of brand recognition elements that have become iconic in the language learning technology space.

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Duolingo's owl (Duo)
Babbel's speaking face logo
Rosetta Stone's hieroglyphic tablet
Memrise's flower character