"The man who speaks 75 languages" is about a great language genius, Georg Justus Julius Sauerwein.
Sauerwein was the greatest linguistic prodigy of his time and mastered about 75 languages. He came to be among the pioneers of Lithuanian and Sorbian literature with the epic poem "Nemunyciai" (The Memel People, 1894). His poem "Lietuvninkais mes esam' gime" ("As Lithuanians we are born", 1879) is still popular in Lihuania.