In her Mystery & Manners, Flannery O’Connor defines personality as reflecting the specific region of the character. When writers fails to describe their character’s region or include the idioms of that region, and instead universalizes their setting, they ineffectually loses their grounding and focus. The plot is meant to reveal the character’s personality through colloquialism directly related to the character’s specific region. If a writer, for instance, centers on a story in Georgia about a man born in that state, yet fails to relate anything from Georgia, he is creating a flat, universal atmosphere.
In my own fiction writing, I have learned to place my characters in specific settings in order to convey reality to my readers. I understand I must observe my natural surroundings in order to help my readers fully experience the story. I must show where the writer is through specific dialogue, such as through colloquialism, setting, and action.