Jürgen M. Meisel is Emeritus Professor of Romance Linguistics at the University of Hamburg and Adjunct Professor in the Department of Linguistics and Distinguished Fellow in the Language Research Centre at the University of Calgary. In 2004, he was awarded an honorary doctorate by Lund University. He directed the Research Center on Multilingualism (Hamburg) from 1999 through 2006, and he is founding editor of the journal Bilingualism: Language and Cognition. Dr Martin Elsig is Research Assistant in the Department of Romance Languages and Literatures at the Goethe-University Frankfurt. His research interests are in language variation and change with a particular focus on the morphosyntax of French and Spanish. Esther Rinke is Professor of Iberoromance Linguistics at the Goethe-University Frankfurt. Her research covers Romance linguistics, diachronic syntax, language contact and multilingualism.