Does Genesis 10:5 really suggest that various tongues (languages) already existed BEFORE the confusion of tongues at Babel (Genesis 11:1)?

Does Genesis 10:5 really suggest that various tongues (languages) already existed BEFORE the confusion of tongues at Babel (Genesis 11:1)?

"Speaking of Noah’s descendants through his grandson Javan, Genesis 10:5 says: “From these the population of the isles of the nations was spread . . . , each according to its tongue, according to their families, by their nations.”

"Genesis chapter 10 presents what is commonly known as the “Table of the Nations.” It lists 70 families or nations descending from Noah’s sons, giving some indication of where these eventually spread to and settled. Of course, Moses recorded this centuries after the Flood and the confusion of languages at Babel. So he was in position to bring together in what is now Genesis chapter 10 details of how things worked out over the centuries.

"After Genesis chapter 10 gives the details of the “Table of the Nations,” chapter 11 takes up the narrative or chronological history with Babel and shows how it was that many languages came about and why peoples spread over the globe.—Gen. 11:1-9.

"Thus the references in the 10th chapter to various languages are not to be understood as meaning that these developed prior to the confusion of languages at Babel. (Gen. 10:5, 20, 31, 32) But those tongues were later found among Noah’s descendants, whose lineage is provided in that chapter." - Questions from Readers, 7/15/78 Watchtower (Emphasis mine)

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