Professor Emeritus of Linguistics, Brigham Young University

Anniversary Professor of Language and Linguistic Science, University of York

Professor of Linguistics, Queen Mary University of London

Paris Lodron Universität Salzburg

Professor (by SA) of Low Saxon / Groningen Language and Culture, University of Groningen

The University of Texas at Austin

Dickson, Allen, and Anderson Centennial Professor, UT Austin

Professor of Education, University of California, Irvine

Professor of linguistics, University of Luxembourg

Full Professor of Linguistics, Catholic University of Portugal, Braga