(Language is Irrelevant)
If we made it a non-Arabic Quran they would have said, “Why did it come down in that language?” Whether it is Arabic or non-Arabic, say, “For those who believe, it is a guide and healing. As for those who disbelieve, they will be deaf and blind to it, as if they are being addressed from faraway.”
وَلَو جَعَلنٰهُ قُرءانًا أَعجَمِيًّا لَقالوا لَولا فُصِّلَت ءايٰتُهُ ءَأَعجَمِىٌّ وَعَرَبِىٌّ قُل هُوَ لِلَّذينَ ءامَنوا هُدًى وَشِفاءٌ وَالَّذينَ لا يُؤمِنونَ فى ءاذانِهِم وَقرٌ وَهُوَ عَلَيهِم عَمًى أُولٰئِكَ يُنادَونَ مِن مَكانٍ بَعيدٍ
wa law ja’alnaahu Qur-aanan A’jamiyyal laqaaloo law laa fussilat Aayaatuhoo ‘a A’jamiyyunw wa ‘Arabiyy; qul huwa lillazeena aamanoo hudanw wa shifaaa’unw wallazeena la yu’minoona feee aazaanihim waqrunw wa huwa ‘alaihim ‘amaa; ulaaa’ika yunaadawna mim maakaanim ba’eed