In many engineering domains, the active participation of different actors in the early phases of the development of DSLs/DSMLs is a key for avoiding the final language to actually "miss the target". The Collaboro tool (https://code.google.com/a/eclipselabs.org/p/collaboro/), currently being developed, enables the involvement of the concerned community (i.e., end-users, developers, etc.) during the language creation process. It includes collaborative process support, notably via a DSL to represent change proposals as well as to discuss possible solutions, comments and decisions made.