Current European language education policies are governed by two pillars: the task-based approach and verbal interaction. Since the mid-1990s, with the emergence of computer-mediated communication tools, there has been an introduction of telecollaboration and virtual exchange in foreign language learning, with a progressive institutionalization of these forms of learning arriving at the Erasmus + Virtual Exchange project of the European Commission. The scientific goal of our network is to advance our knowledge of foreign language acquisition in computer-mediated communication and to translate this knowledge into the design of language learning environments and tasks in the private and public sectors. This scientific goal is pursued by a network currently comprising eight European partners in six countries, two non-European partners and one partner from the United Kingdom. The disciplines present are language sciences, education sciences and computer science. The areas of expertise in the consortium are multimodal analysis of the interactive dynamics underlying language acquisition (conversational alignments, specific phenomena such as negotiations of meaning), multimodal corpus building and analysis using (semi-)automatic natural language processing tools, task design and digital learning environments, online language training management and marketing. This consortium is expected to expand with greater participation from the private sector. The consortium will pursue R&D by training and collaborating with a group of ten young researchers. These young researchers will be trained to develop transversal skills that will enable them to navigate between the public and private sectors. This training will be done by combining distance learning, training with periods of mobility (between academic partners and in companies), and an annual one-week training course bringing together all the partners. Within the framework of the MRSEI project, the following tasks will be carried out: formalization of the scientific programme for submission to the AAP MSCA ITN; recruitment of non-academic partners; formalization of the training of young researchers; planning of dissemination; writing of the ITN project. These tasks will be accomplished through two three-day meetings with the entire consortium and close collaboration between the work-package managers of the future ITN project. The consortium will be helped by Protisvalor, the subsidiary of Aix Marseille for the support of researchers in the writing of European projects. By supporting the future ITN project by a French team, this project will consolidate the role of France and the tools and infrastructures it finances (such as the Ortolang platform, Equipex ANR-11-EQPX-0032) in European research.