John Ronald Reuel Tolkien (JRRTolkien) was a philologist in the very strict sense of the term. This term, philologist, comes from the Greek [φίλος (philos) and λόγος (logos)] and literally means “love of words”. According to the Oxford Dictionary, it is “the scientific study of the development of language or a particular language,” which is precisely what Tolkien did throughout his life. Tolkien was, as has been said, a deep lover of words, which he began to develop at an early age. In 1900, when he and his family had to move to Birmingham to be closer to King Edward's School, Tolkien discovered Gaelic, a language in which he showed great interest and which "opened him to another linguistic world" (" the open otro mundo linguistic”, Carpenter, 2002: 37). On his return to King Edward's, after a year at St. Philip's School, he began to learn Greek; he already knew Latin as his mother had taught him at home. When his literature teacher read Geoffrey Chaucer's The Canterbury Tales in the original Middle English version, "he decided to learn more about the history of the language" (Carpenter, 2002: 39), "why languages ​​are what they are” (“por qué eran como eran” Carpenter, 2002: 46). His discovery of Anglo-Saxon was also an important element in his approach to philology. As we can see, his encounter with these “new-old” languages ​​was continuous: Old Norse, Gothic, etc. This was also the starting point for his creation of private languages ​​(Naffarin). Thanks to his in-depth study of these languages, we today have works like The Silmarillion, The Hobbit or The Lord of the Rings, because Tolkien's imagination did not come from elsewhere but from language itself, as the said Segura (2008) saying that "his imagination was...... average" of paper ......o.-Carretero, M.-"Catastrophe." Oxford Learners' Dictionaries. 2014. http://www.oxfordlearnersdictionaries.com/definition/english/catastrophe-Coleridge, ST 1984. Biographia Literaria. P.6. Princeton: Princeton University Press.-“Eucatastrophe.” Oxford Dictionaries, Language Matters. 2014. http://www.oxforddictionaries.com/es/definicion/ingles/eucatastrophe-Lewis, CS 2002. On Stories and Other Essays on Literature. EE.UU: Mariner Books.-Segura, E. 2008. JRRTolkien: Mitopoeia y Mitología, reflections bajo la luz refractada. Spain: Portal Editions.-Segura, E. 2001. El Viaje del Anillo: Mapa narrativo de la Tierra Media.-Tolkien, JRR (lecture given in 1939). On fairy tales.-Tolkien, JRR 19 ??. The Lord of the Rings: The Two Towers.-Olsen, C. 2010. On fairy tales. http://www.festivalintheshire.com/journal5hts/5tolkienprofessor.html