Question: Who was the linguist who expanded on languages initially developed by the author of "The Hobbit"?
Sentence (from "J. R. R. Tolkien"): John Ronald Reuel Tolkien, ( ; 3 January 1892 – 2 September 1973) was an English writer, poet, philologist, and university professor who is best known as the author of the classic high-fantasy works "The Hobbit", "The Lord of the Rings", and "The Silmarillion".
Relevant evidence: Yes