Which famous language learning platform launched with the tagline 'The free language-learning app that actually works'?

Famous taglines have shaped how we perceive language learning brands for decades. These carefully crafted phrases have become synonymous with their companies, often incorporating clever linguistic elements that showcase the brand's approach to language acquisition. Test your knowledge of the language learning industry's most influential marketing phrases that have entered our cultural lexicon.

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Duolingo
Rosetta Stone
Babbel
Memrise