“…The languages included into the core of my areal-typological investigation are the major standard Slavic languages (Russian, 1 Polish, Czech, Slovak, Bulgarian, Macedonian, Bosnian/Croatian/Serbian, as well as a variety of Upper Sorbian known as "Colloquial Upper Sorbian", Breu 2000bBreu , 2012, the Baltic languages (Lithuanian and Latvian), Yiddish and German, Hungarian, Ossetic, the Kartvelian languages (Georgian, Svan, Mingrelian and Laz), as well as the North-West Caucasian Adyghe. The inclusion of German and Adyghe, which do not have prefixal perfectivization sensu stricto, is justified by the necessity to have some "controls" for the study, constituted by verbal systems with the productive use of preverbs without systematically developed aspectual functions.…”