Reinhold Olesch (September 24, 1910 in Zalenze, Upper Silesia â June 23, 1990 in Brühl, Rhineland) was a linguist, Slavic studies Professor of University of Vienna. He researched the Slavonic dialects of Upper Silesia, which he recognized as his mother tongue. He published several works about them, including: "Die slawischen Dialekte Oberschlesiens" (Slavonic dialects of Upper Silesia) and "Beiträge zur oberschlesischen Dialektforschung â Die Mundart der Kobylorze".