[It is] an Arabic Qur'an, without any deviance that they might become (39:28)

Almuntakhab Fi Tafsir Alquran Alkarim

A Quran revealed in the Arabic literary form, well founded, constant and resolute, a Quran that does not allow in its structure declension, obliquity or crookedness so that they -people- may hopefully keep in awe of Allah and entertain the profound reverence dutiful to Him

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(39:28) It is an Arabic Qur'an *46 free of all crookedness *47 that they may guard against their evil end.

[It is] an Arabic Qur'an, without any deviance that they might become meaning

*46) That is, "It has not been sent down in a foreign language so that the people of Makkah and Arabia should stand in need of a translator or interpreter, but it is in their own language, which they can understand directly."
*47) That is, "There is nothing of double-dealing in it so that a common man should find it difficult to understand, but everything has been presented in it in a straightforward manner, from which everyone can know what this Book states as wrong and why, what it states as right and on what ground, what it wants the people to accept and what it wants them to reject, and what it enjoins and what it forbids."
 

[It is] an Arabic Qur'an, without any deviance that they might become meaning in Urdu

ایسا قرآن جو عربی زبان میں ہے، جس میں کوئی ٹیڑھ نہیں ہے، تاکہ یہ برے انجام سے بچیں