Europe is a Babel tower. It would be impracticable to produce this website in each language of the participating societes, the list of which already would include (by the end of 2021), in alphabetic order, Bulgarian, Catalan, Croatian, Dutch, English, French, German, Italian, Polish, Portuguse, Russian, Serbian and Spanish, not to mention the many languages of the other European researchers who we’d like to see join us. The common language of this website therefore will be International English. We hope however to develop multilingual projects, for which the help of participants and visitors will be welcome.