What is the ruling on changing one's dialect from rural to urban, and is that considered affectation? And is it permissible to persist in doing so?

Replacing the letter Qaf with a hamza in some eastern dialects is permissible, and there is no harm in speaking with it constantly, because adherence to classical Arabic is not obligatory. Affectation is considered blameworthy if a person feigns what he cannot manage or displays eloquence out of pride. As for natural speech, there is no harm in it. The Prophet, peace and blessings be upon him, indicated the dispraise of affectation and pretentious eloquence when he said: "Indeed, the dearest of you to me and the closest of you to me in station on the Day of Resurrection are those with the best manners. And indeed, the most hateful of you to me and the furthest of you from me on the Day of Resurrection are the Thartharun, the Mutashaddiqun, and the Mutafayhizun." The Thartharun are those who speak excessively out of affectation, the Mutashaddiqun are those who stretch their speech and fill their mouths with pretentious eloquence, and the Mutafayhizun are those who fill their mouths with words to display their eloquence and superiority.