In many fields of professional practice and research, conversations can no longer be conducted in the first language of the respective participants. The increasing diversity of languages, of multi- and translingualism require the involvement of language mediators/interpreters. In the contexts of flight, asylum and migration, this interdisciplinary volume discusses different procedural strategies for overcoming linguistic as well as culturally conditioned communication barriers and highlights the emerging methodological and theoretical challenges for social counselling and therapy practice as well as for the practice of qualitative research.