Does showing off affect the Fajr prayer, and must the prayer be repeated after feeling remorse? And is uttering a word that shows disrespect towards Allah, followed by remorse, performing ablution, uttering the two testimonies, and performing the prayer considered correct?

One should strive against the self to abandon the love of prominence and to seek Islamic knowledge. What was mentioned does not affect the prayer, nor does it necessitate repeating it. It is advised not to give in to the whisperings of riya' (showing off) lest it lead to abandoning good deeds. As for the word, if it causes apostasy, then what was done is correct; otherwise, we advise ignoring such whisperings, because giving in to them leads to great evil.