Seeing as how the Arab did not have an awareness of other than his own language...
Seeing as how the Arab did not have an awareness of other than his own language, the non-Arab referred to others as Ajam as well since they did not properly understand Arabic or were not able to speak the Arabic language in a correct manner.
Keeping in mind the history of revelation of this verse of the Qur`an which some commentators have mentioned, the purpose of this verse is to ask the question that: Is it logical to bring up a point of contention that, “Is it right to claim that the Prophet (‘s) had learnt the Qur`an from such individuals (non-Arabs or those who were not eloquent in the Arabic language), where as we see that the Qur`an is replete with eloquence, expressiveness, allure and attraction and has a certain sweetness and harmony to it!?
When we look at the speech of these two individuals (the two Romans mentioned above), we see that they definitely lacked these qualities since they were Romans and were individuals who had no awareness of the Arabic language.
Even if we assume that they knew the general workings of the Arabic language, however still, we know that they could not speak the language well and their words and thoughts were not free from errors and distortion.” Therefore, the true meaning of the verse under review is that the Qur`an is an accurate speech, an eloquent communication and is free from all forms of error and distortion (in the language used).
Due to this, we are not able to accept the influence of these two individuals or others such as them. However it must be noted that by the Qur`an being an eloquent and expressive work, or a writing which is free from errors and distortions does not mean that the prerequisites which have been explained in this book are not needed. Thus, there is no incongruity between requiring such prerequisites as mentioned in this work and the Qur`an being a work of “plain and clear Arabic”.
Today in all countries of the world, we see various technical books on the mode of teaching or books of higher learning which have been written in very smooth and fluid style which are far removed from any sort of complexity. Unfortunately though, all of these books, or at least a good majority of them, are still in need of a teacher or instructor (in order to understand them).