Is the Noble Qur’an one, or are there multiple readings of the Qur’an that differ in spelling, diacritics, grammatical inflections, and the changing, omitting, or adding of words?

The Holy Qur’an is one, and no one can alter it, change it, add to it, or subtract from it; for Allah has guaranteed its preservation. What was mentioned about the lexicon is an encyclopedia of the frequent (mutawatir) and anomalous (shadhdh) readings, which are different ways of recitation and part of the seven aḥruf (modes) in which the Qur’an was revealed, and not every one of them is a Qur’an. As for the Seven Oft-Repeated Verses (Al-Sab‘ al-Mathānī), what is meant by them is the Opening Chapter of the Book (Surat al-Fatihah), and they have no relation to the seven readings or the frequently transmitted (mutawatir) Hadith about the revelation of the Qur’an in seven aḥruf. The variations in readings do not go beyond being an interpretation or a synonym, and there is no contradiction in them. One should not be preoccupied with the claims of fabricators that the Qur’an is multiple.