This study investigates teacher mediation strategies in CLIL-based Korean presentation classes, with particular attention to how teachers support learner agency and intercultural competence. Using a multi-cycle action research design, classroom interactions were closely examined to identify the instructional moves through which teachers facilitated communication, scaffolded learner output, and integrated cultural perspectives into language practice. Analysis revealed four principal categories of strategies: interaction facilitation, spontaneous output promotion, cultural understanding and communication, and critical reflection. These categories frequently co-occurred within the same instructional episode, reflecting the dynamic and layered nature of CLIL pedagogy. Early stages of the course emphasized stabilizing interaction and reducing learners’ performance anxiety, while later stages increasingly foregrounded intercultural reflection and the negotiation of cultural meanings. The findings demonstrate that teachers act as strategic mediators who coordinate linguistic, cognitive, and cultural processes in real classroom situations. This study highlights how CLIL-based presentation classes can operationalize integrated learning goals and offers pedagogical insights for designing Korean-language courses that cultivate both communicative competence and intercultural awareness.

This study aims to collect and analyze Common European Framework of Reference for Languages (CEFR)-related research in Korean language education to identify emerging trends. It examines 28 academic articles published in Korea from 2020 to 2024, using text mining and language network analysis methods. Term Frequency (TF) and Term Frequency-Inverse Document Frequency (TF-IDF) analyses revealed that studies on curriculum design and application in Korean language education appeared with high frequency. Semantic network analysis identified key research directions, such as comparing proficiency level systems in Korean curricula, proposing “mediation” activities based on CEFR, and evaluating CEFR as an assessment tool. Latent Dirichlet Allocation (LDA) topic modeling categorized the studies into three groups: (1) research directly analyzing CEFR, (2) research applying CEFR to overseas Korean language curriculum design, and (3) research comparing existing Korean curricula with CEFR. This study is significant as the first to analyze CEFR-related research trends in Korean language education. By employing objective data analysis tools such as text mining, it enhances the reliability of findings and provides valuable insights into recent research trends.