Duolingo is a leading language-learning platform that offers over 100 courses in more than 40 languages, designed to make language acquisition accessible, engaging, and effective. Founded in 2011 by Luis von Ahn and Severin Hacker, the company has since grown into one of the most popular educational technology services worldwide, known for its innovative use of gamification and AI-driven personalized learning paths[5][2]. The core of Duolingo’s offering is its mobile-optimized app and web platform, which deliver bite-sized, self-paced lessons combining vocabulary, grammar, reading, writing, listening, and speaking exercises. The platform uses multimedia elements, including audio, video, animations, and speech recognition, to create an interactive learning environment. Gamification is central, with features like points, streaks, badges, and leaderboards motivating users to maintain daily practice habits. The app’s mascot, Duo the owl, provides encouragement and a friendly interface that reduces learner anxiety[1][2][4]. Duolingo’s pedagogical approach emphasizes microlearning and adaptive AI that personalizes study plans based on user performance, helping learners focus on areas needing improvement through targeted practice. For example, intermediate learners can access additional content such as Duolingo Stories and Podcasts, which provide contextualized reading and listening practice. The platform also supports languages with distinct writing systems through specialized reading lessons[5]. The organization has expanded its offerings with premium tiers, including Duolingo Super and Duolingo Max. Super removes ads and adds advanced practice tools, while Max integrates cutting-edge GPT-4 AI technology to offer features like “Explain My Answer” and interactive roleplay exercises, enhancing the learning experience with conversational AI[8]. Duolingo’s impact is significant: research cited by the company shows learners who complete five sections on Duolingo perform comparably to students after five semesters of university language courses. Its intuitive design, broad accessibility, and continuous innovation position Duolingo a