Gregory of Nyssa, on Gen 11:1

And if any one cites the confusion of tongues that took place at the building of the tower, as contradicting what I have said, not even there is God spoken of as creating men's languages, but as confounding the existing one, that all might not hear all. For when all lived together and were not as yet divided by various differences of race, the aggregate of men dwelt together with one language among them; but when by the Divine will it was decreed that all the earth should be replenished by mankind, then, their community of tongue being broken up, men were dispersed in various directions and adopted this and that form of speech and language, possessing a certain bond of union in similarity of tongue, not indeed disagreeing from others in their knowledge of things, but differing in the character of their names. For a stone or a stick does not seem one thing to one man and another to another, but the different peoples call them by different names. So that our position remains unshaken, that human language is the invention of the human mind or understanding. For from the beginning, as long as all men had the same language, we see from Holy Scripture that men received no teaching of God's words, nor, when men were separated into various differences of language, did a Divine enactment prescribe how each man should talk. But God, willing that men should speak different languages, gave human nature full liberty to formulate arbitrary sounds, so as to render their meaning more intelligible. Accordingly, Moses, who lived many generations after the building of the tower, uses one of the subsequent languages in his historical narrative of the creation, and attributes certain words to God, relating these things in his own tongue in which he had been brought up, and with which he was familiar, not changing the names for God by foreign peculiarities and turns of speech, in order by the strangeness and novelty of the expressions to prove them the words of God Himself.