J.R.R. Tolkien’s academic specialty was philology, the historical study of languages and texts. His professional work focused especially on Germanic languages, Old English, Middle English, and related literary traditions.
Tolkien’s language scholarship strongly shaped his fiction. He studied how words change over time, how languages are related, and how historical texts preserve older forms of speech. His invented languages, including Quenya and Sindarin, were developed with internal histories, sound changes, and relationships between earlier and later forms.
Philology is sometimes confused with linguistics, archaeology, or literary criticism. Those fields overlap, but philology traditionally combines language history with the interpretation of written texts. Tolkien was also a major literary scholar: his 1936 lecture “Beowulf: The Monsters and the Critics” helped change modern academic views of the poem. His fiction and scholarship therefore grew from closely connected interests.