14:4.3
Muhammad Asad Commentary & Translation
Since every divine writ was meant to be understood by man, it is obvious that each had to be formulated in the language of the people whom the particular prophet was addressing in the first instance; and the Qur'an - notwithstanding its universal import (cf: note 126 on 7:158) - is no exception in this respect.
Translation
(14:4) AND NEVER have We sent forth any apostle otherwise than [with a message] in his own people's tongue, so that he might make [the truth] clear unto them; [3] but God lets go astray him that wills [to go astray], and guides him that wills [to be guided] -for He alone is almighty, truly wise.