Which language learning app's 2013 advertising campaign introduced the phrase 'super duolingo' that later became a widely recognized meme and entered colloquial speech to describe intensive learning?

In the world of language and linguistics, advertising slogans play a significant role in shaping communication patterns and introducing new expressions into our everyday vocabulary. This trivia question explores how a major language-focused product successfully influenced linguistic trends through its advertising campaign. Test your knowledge about the intersection of product marketing and linguistic innovation!

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Duolingo's 'Language Gamified' campaign
Babbel's 'Speak Confidently' campaign
Rosetta Stone's 'Think In A New Language' campaign
Memrise's 'Learn With Locals' campaign