He studied at Berlin and Leipzig, and in 1874 became professor of German language and literature in the University of Freiburg. In 1893 he was appointed professor of German philology at the University of Munich. He was a prominent Neogrammarian.
His main work, Prinzipien der Sprachgeschichte (Halle: Max Niemeyer, 1st ed. 1880; 3d ed. 1898), has been translated into English: Paul, Hermann 1970. Principles of the History of Language, translated from 2nd edition by H. A. Strong (1888; retranslated with changes by Strong, Logeman, and Wheeler in 1891). College Park: McGroth Publishing Company, ISBN 0-8434-0114-1.
According to Paul, sentences are the sum of their parts. They arise sequentially from individual associations, linked together in a linear form (1886. See also, Blumenthal, 1970). Wilhelm Wundt opposed this theory of sentences, arguing that they begin as a simultaneous thought that is converted into linear, sequential parts (1900).
- Gab es eine mittelhochdeutsche Schriftsprache? (“Was there a middle high German written language?,” 1873)
- Zur Lautverschiebung (“Vowel shifting,” 1874)
- Kritische Beiträge zu den Minnesingern (“Critical contributions on the Minnesingers,” 1876)
- Zur Nibelungenfrage (“On the Nibelungen question,” 1877)
- Mittelhochdeutsche Grammatik (“Middle high German grammar,” 1881; 25th edition, 2007)
- Grundriss der germanischen Philologie, editor (“Outline of German philology,” 1891-93)
After 1874 Paul and Wilhelm Braune edited the Beiträge zur Geschichte der deutschen Sprache und Literatur (“Contributions to the history of the German language and its literature”).
This Hermann Paul is not to be confused with Hermann Daniel Paul (1827–1885), who emigrated from Germany to Finland, where he worked as a language teacher and music reviewer. He published a translation of the Finnish national epic Kalevala in 1885 (G. W. Edlund's publishing house, Helsingfors).
- Prinzipien der Sprachgeschichte, German original of Hermann Paul's main book Principles of the History of Language
- A partial French translation of Hermann Paul's main book, Principles of the History of Language