"And if We had made it a non-Arabic Quran, they would have said, 'Why'"—meaning, why were not "its verses explained in detail?" That is, clarified. "Is it non-Arabic and Arabic?" This refers to the recitation of those who read it without an interrogative, and those who read it with an interrogative lengthened it: "Is it non-Arabic and Arabic?" That is, they would have said: A non-Arabic book and an Arabic Prophet, using that as an argument; meaning, how can this be?!