This report documents the program and the outcomes of the Dagstuhl Seminar 14412 “Globalizing Domain-Specific Languages ” held in October 2014. Complex, data-intensive, cyber-physical, cloud-based etc. systems need effective modeling techniques, preferably based on DSLs to describe aspects and views. Models written in hetero-geneous languages however need to be semantically compatible and their supporting individual tools need to be interoperable. This workshop discusses possible and necessary forms of inter-operation their benefits and drawbacks and in particular whether there is a general pattern on coordination, composition and interoperation possible. Main goal was to establish a research programme towards such techniques