Actually technically the English language doesn't exist in Star Wars. Human languages are used to represent fictional languages in the Star Wars universe - in the case of Modern English, it represents the Aurrabesh language (aka Galactic Basic). Some languages are combinations of human languages (e.g.: Ewokese is mostly Mongolian with some Nepalese and Tibetan thrown in) and others are just entirely fictional (e.g.: Wookie, Geonosian etc). Tolkien did the same thing where some real languages represented language of Middle Earth, e.g.: Modern English represented the language of Gondor, Old English represented Rohirrim (language of Rohan), whereas others were entirely fictional (e.g.: Elvish, Orcish, Dwarvish etc). and some were modifications of real languages, e.g.: Hobbitish is modified Modern English.

But yeah, real world languages technically don't exist in Star Wars or Tolkien literature.