A Content Analysis of the Duolingo Application

In recent years, the increasing role of digital Technologies in foreign language learning and teaching has led to a more widespread use of digital applications in education. In this context, the Duolingo application, with its user-friendly interface, gamified activities, wide range of languages, and coverage of fundamental language skills such as reading, writing, listening and speaking, has become a focal point of interest for both individual users and researchers. The primary aim of this studuy is to examine articles on the Duolingo application published between 2020 and 2025 through content analysis, in order to identify gaps and recurring themes in the literature. The research was conducted using a qualitative design, employing content analysis as the data collection and analysis method. National and international academic articles were systematically evaluated and analyzed based on categories such as publication year, country, research methodology, themes, participant groups, and target languages. A total of 81 articles were included and analyzed within the scope of this study. Findings indicate that studies on the Duolingo application display geographical diversity and are shaped by contributions from researchers across various countries. In terms of research methodologies, the studies approach the subject from multiple perspectives. Thematically, mobile-assisted language learning (MALL), vocabulary acquisition, gamification, and fundamental language skills are emphasized. This study provides a systemic overview of the academic status and development of the Duolingo application over time, offering a resource to guide future research in the field.