Harvard University | Columbia University | Yale University | University of Paris | New York University | Stanford University | Princeton University | University of Cambridge | University of Pennsylvania | University of Michigan | University of Chicago | University of California, Berkeley | University of Toronto | Cornell University | University of Oxford | University of London | University of Oslo | Cambridge University | University of Southern California | McGill University | Johns Hopkins University | Northwestern University | University of California | Brown University | University of Queensland | University of Minnesota | University of Washington | University of Notre Dame | University College London | Duke University |
Research on Romano-British influence in English has intensified in the 2000s (decade), principally centering around The Celtic Englishes programmes in Germany (Potsdam University) and The Celtic Roots of English programme in Finland (University of Joensuu).
Petri Salo has visited as a guest lecturer in various universities in Finland (University of Helsinki, University of Joensuu), Scandinavia (University of Gothenburg (Gothenburg), Sweden, Norwegian University of Science and Technology Trondheim, and University of Tromsø, Tromsø, Norway), Estonia (University of Tarto), the U.S. (University of Minnesota) and Australia (Charles Sturt University, Wagga Wagga)