The narrator’s spoken language differed from Dee’s and Maggie’s because
The narrator speaks in African American dialect, while her daughters speak more Standard English.
Only Dee spoke in standard English and not Maggie. The story “Everyday Use” begins with the scene in which the mother is waiting for the arrival of her daughter Dee. She feels terrified thinking about her elder daughter Maggie who would feel nervousness and self-consciousness during Dee's stay. She recalls the day when their house caught fire and how she had rescued Maggie. Maggie was badly burned in the fire. Dee's education and exposure towards the English have made her distinct from her mother and sister.