He felt little concern, however; let the old man read about a real mystery instead of his fictional sleuth stories.
Or to continue with fictional cases: Why does gasoline made from oil refined at one refinery burn more efficiently?
The main theme of "Voicebox," the long fictional narrative in the middle of the book, is communication.
While Tolkien is attributed with writing several languages as part of developing his fictional worlds, the Elvish languages developed for his stories includes basic terminology and are not a languages with large or complex vocabularies.