Just as research in language learning is moving beyond the four walls of the classroom, there is a growing awareness that language use (and simultaneous learning) takes place in increasingly complex and interconnected ways, in particular through the use of technology. This chapter summarizes an investigation into multimodal communicative competences in an online telecollaborative environment in which student-teachers (pupils studying to become foreign language teachers) interacted through diverse social media. Additional sources for more reading are provided. [A Catalan version of this chapter is also included in the book. For the complete volume, "Qualitative Approaches to Research on Plurilingual Education," see ED573580.]