A Bibliometric Analysis of Content and Language Integrated Learning: Trends, Key Authors, and Research Evolution Nearly 31 Years

This study investigates the development of Content and Language Integrated Learning (CLIL) research through a large-scale bibliometric analysis spanning nearly three decades (1994–2022). Although CLIL has achieved widespread adoption in educational systems, previous reviews are fragmented by timeframe, educational level, or pedagogical focus, which restricts a systematic understanding of the field’s evolution across diverse contexts. To address this limitation, the study reviewed 842 peer-reviewed journal articles indexed in the Web of Science (WoS) using keyword co-occurrence, reference co-citation, and bibliographic coupling techniques. The findings demonstrate a distinct developmental trajectory in CLIL research, evolving from early theoretical foundations to a mature and increasingly diversified field. The analysis identifies three interrelated thematic dimensions structuring CLIL scholarship: language-content integration, teacher training and pedagogical mediation, and technological as well as translanguaging-oriented initiatives. The results further indicate a strong European dominance during the initial stages, followed by the gradual expansion of CLIL research into regions such as Asia and other non-European educational contexts, accompanied by a shift toward digital and more inclusive pedagogies. This study provides a comprehensive overview of the evolution of CLIL research across educational contexts by integrating analyses of temporal, thematic, and intellectual structures. The findings contribute to a clearer conceptualization of CLIL as an evolving pedagogical paradigm and offer guidance for future research, teacher education, and policy development in bilingual and multilingual education.