ABSTRACTContent and Language Integrated Learning (CLIL) is an innovative educational approach applicable to diverse settings. CLIL promotes 21st‐century skills, including logical and critical thinking, problem‐solving, creativity, collaboration, and cross‐cultural awareness. In Asia, particularly Japan, CLIL has predominantly focused on English language acquisition, often overshadowing its broader goal of developing other skills. Accordingly, a new language course has been developed to enhance both language proficiency and 21st‐century skills among Japanese and English learners at an international university in Japan. This study presents findings from a larger case study that examines student and teacher experiences within the new CLIL framework, leveraging translanguaging pedagogy. Analyzing student reflections and interviews, this study highlights the role of translanguaging in enhancing 21st‐century skills such as leadership, critical thinking, and collaboration, particularly in group projects. However, deeply ingrained monolingual beliefs pose challenges to students fully embracing translanguaging methods, despite their educational value. This study provides insights for educators and policymakers advocating innovative language programs, particularly in fostering global citizenship and diverse skillsets essential in contemporary contexts. It also highlights the importance of integrating language learning with broader skill development in multicultural educational environments.