J.R.R. Tolkien’s academic specialty was philology, the historical study of language and texts.
Philology helped Tolkien investigate how words change, how related languages develop, and how manuscripts preserve older literature. His expertise in Old English and medieval languages informed both his teaching and his fiction. Names in Middle-earth often reflect linguistic relationships rather than being arbitrary inventions.
Tolkien’s famous 1931 lecture and later essay “Beowulf: The Monsters and the Critics” helped redirect scholarly attention toward the poem’s artistic structure and monsters, not only its historical value. His professional work is sometimes labeled simply “linguistics,” but philology more precisely describes the historical and textual tradition in which he worked. This scholarship also explains why his invented languages have sound changes, dialects, writing systems, and histories that resemble those of real language families.