This talk focuses on the collaboration between Theo and Jérôme. The talk begins with an introduction to Jérôme who is a phd candidate at the Institute for Control Engineering of Machine Tools and Manufacturing Units (ISW) of the University of Stuttgart. His introduction will include his research, projects, teaching, and life at the ISW. The collaboration topics discussed include a systematic literature review on language workbenches, ten years after Erdweg et al.‘s paper, based on language workbench challenges. The talk provides details on the methodology used for the review, including the search query and interesting findings, as well as the research questions that emerge from the study. The discussion then then moves on to language composition, which presents common operators, aggregation, and embedding, and proposes next steps to extract parameters in more detail and apply them to graphical languages. Finally, the talk concludes with a roadmap for future collaborations between the two researches of Rennes and Stuttgart.