Narrated Anas (raa): Uthman (raa) called Zaid bin Thabit (raa), Abdullah bin Az-Zubair (raa), Said bin Al-‘As (raa) and ‘AbdurRahman bin Al-Harith bin Hisham (raa), and then they wrote the manuscripts of the Holy Qur’an in the form of book in several copies.
‘Uthman (raa) said to the three Quraishi persons. " If you differ with Zaid bin Thabit (raa) on any point of the Quran, then write it in the language of Quraish, as the Quran was revealed in their language."
So they acted accordingly. (Zaid bin Thabit (raa) was an Ansari and not from Quraish ).
Virtues and Merits of the Prophet (saws) and his Companions – Sahih Bukhari: Volume 4, Book 56, Number 709