A hard-working Dane.
(1787 - 1832) An incredibly hard-working Danish philologist — very 19th century. He mastered 25 languages and dialects. He also published a multitude of philological books and treatises on subjects such as Icelandic grammar, Danish orthography, and the history of Scandinavian languages.
In addition, he was one of the first people to discuss the systematic phonological relationships between deceased and living languages through his formulation of what was eventually called Grimm's law , a set of rules that explains how pronunciation evolved in Indo-European languages.