Judith Purkarthofer is a professor of German linguistics at the University of Duisburg-Essen in Germany, working on multilingualism in families, education and other social contexts.Brigitta Busch is a former professor of Applied Linguistics at the University of Vienna and currently extraordinary professor at Stellenbosch University; her interest is in biographical approaches to lived experience of language.Marcelyn Oostendorp is an Associate Professor in the Department of General Linguistics at Stellenbosch University, South Africa, interested in decolonial theory and social space.