Duolingo has taken the online world by storm with its bold, hilarious marketing on TikTok, racking up an impressive 4.3 million followers. However, it doesn’t stop there. It can teach tech startups a lot, from the importance of gamification to ensuring product engagement. Duolingo is a free language learning website and mobile app allowing users to practice vocabulary, grammar and pronunciation using spaced repletion for 39 different languages. Here, Startups Magazine hears from CEO of AdamFard UX Studio, Adam Fard, discussing the key takeaways from Duolingo for tech companies.