Between Languages, Beyond Words: Emotional Expression and Code-Switching in Bilinguals

Code-switching, the alternation between two or more languages within a single interaction, is a ubiquitous feature of bilingual communication traditionally examined through linguistic or cognitive lenses. However, growing evidence reveals that code-switching also serves critical emotional functions, allowing bilingual speakers to express, regulate, and modulate emotions in context-sensitive ways. This literature review synthesizes interdisciplinary research from sociolinguistics, psycholinguistics, and neurocognitive studies to explore the emotional dimensions of code-switching. It highlights how language choice is influenced by emotional resonance, cultural identity, and interpersonal goals, and demonstrates how code-switching facilitates emotional authenticity, psychological distancing, and social intimacy. Practical implications are discussed across educational, therapeutic, and professional settings, with attention to how emotional code-switching enhances communication and belonging. The review concludes by identifying key gaps in current research—such as understudied language pairs, age-related patterns, and the need for longitudinal studies—and proposes future directions that leverage technological advancements to deepen our understanding of bilingual emotional life.