The study looked at how effective Duolingo is for learning languages, focusing on its fun features and notifications. They interviewed a housewife learning English and a student learning Turkish. Duolingo helps improve vocabulary and grammar skills, and its game-like elements keep users engaged. However, there are some drawbacks like limited lives and lack of real-life practice. The researchers suggest adding artificial intelligence for speaking practice and more lives to make Duolingo even better for language learning.