In the cluster 'Spaces of Multilingualism, Migration, and Cultural Transformation,' we explore the relationship between space and multilingualism from an interdisciplinary perspective, integrating insights from sociolinguistics, language education, cultural studies, and translation studies. From a sociological standpoint, space is not simply a physical backdrop for multilingual practices; rather, it is a complex social construct that is generated and perpetuated through habitualized practices. This approach to spaces also entails a focus on the concept of borders, as well as on cross-border processes and cultural transformations. The cluster examines the social, institutional, cultural, political, and imagined spaces of multilingualism, within which social power dynamics and categorizations are embedded, and which are invariably connected to processes of temporal change.