The choice of words that people use says something beyond the surface of what they have said. Sometimes the deeper meaning is intended. Sometimes it is not intended. There can be occasions where that deeper meaning comes from the speaker--or narrator or the like as the case may be. Sometimes that deeper meaning comes from another source than the speaker. This last option adds a host of other implications and potential additional meanings. The question is how do you impart the deeper level and additional ideas when it is all too easy to miss the intended influence?
The first answer is to be very blatant about it. Some biases are readily apparent with only a minimum of work. Unwavering repetition is a fair sign too, but may speak to a different issue such as the narrator's vocabulary breadth or a lack of imagination. That repetition could also be a matter of no more precise a word to be substituted. Secondary information sources might back up and clarify the idea presented by the narrator, either as quotes or as separate literature (in the sense of pamphlets and books) available to the reader/listener/viewership.
The medium of a fiction blog opens up a different kind of opportunity to address the deeper layers. That opportunity comes in the form of reader comments. If the blog is a fiction to a level that there are fictional people leaving comments on the entries then one of these characters may call the poster to task for using the word. This commenter might applaud the specific use of words, condemn them, or ask for clarification. More subtle and involved methods might also be available as well.
Music: 10538 Overture by Def Leppard and Black Diamond by Stratovarius.