This paper will discuss new research opportunities for exploring dimensions of multilingualism at the school and university levels referring to PlurCur® as a prototype for a multilingual whole school policy and functional multilingualism as a university-level approach. We are guided by Aronin’s concept of Dominant Language Constellations as it relates to individuals and by the description of institutional Dominant Language Constellations in Björklund and Björklund 2021. We sketch another broad and multifaceted dimension in between these levels with the aim of describing, conceptualising and tracing the contours of the spaces that emerge between the individual and institutional levels which have received little attention up to now. We see many different variants of Dominant Language Constellations, in our research extended to Dominant Languages Constellations, at this level or in this space that overlap and are linked to each other in many ways; taken together, they represent a research topic with special relevance for school and university development processes in the contexts of both tacit and explicit languages policies.