Is clarity in articulating letters a prerequisite for the pronouncements of the daily prayers (adhkar al-salat) and the morning and evening remembrances (adhkar al-sabah wal-masa'), and is it necessary to repeat the remembrance if a letter is not pronounced correctly or clearly?

Clearly enunciating the letters, if it means giving each letter its due and its proper articulation point, then this is best. But if it means changing the letter from its true form, then this is a linguistic error (laḥn) and it is not permissible to do it intentionally. If the linguistic error alters the meaning, the prayer becomes invalid according to some scholars. There is no harm in deviating from this due to an accent or a foreign tongue, but one must strive to enunciate the letters eloquently. If one who is capable makes a mistake, they must repeat it, unless that leads to obsessive doubts (waswās). All that has been mentioned includes the remembrance (adhkār) of prayer and other forms of remembrance.