"There was even a time when men were wholly ignorant of the art of writing ..."

"And now regarding thy question, “How is it that no records are to be found concerning the Prophets that have preceded Adam, the Father of Mankind, or of the kings that lived in the days of those Prophets?” Know thou that the absence of any reference to them is no proof that they did not actually exist. That no records concerning them are now available, should be attributed to their extreme remoteness, as well as to the vast changes which the earth hath undergone since their time.

Moreover such forms and modes of writing as are now current amongst men were unknown to the generations that were before Adam. There was even a time when men were wholly ignorant of the art of writing, and had adopted a system entirely different from the one which they now use. For a proper exposition of this an elaborate explanation would be required.
Consider the differences that have arisen since the days of Adam. The divers and widely-known languages now spoken by the peoples of the earth were originally unknown, as were the varied rules and customs now prevailing amongst them. The people of those times spoke a language different from those now known. Diversities of language arose in a later age, in a land known as Babel. It was given the name Babel, because the term signifieth “the place where the confusion of tongues arose.”

Subsequently Syriac became prominent among the existing languages. The Sacred Scriptures of former times were revealed in that tongue. Later, Abraham, the Friend of God, appeared and shed upon the world the light of Divine Revelation. The language He spoke while He crossed the Jordan became known as Hebrew (Ibrání), which meaneth “the language of the crossing.” The Books of God and the Sacred Scriptures were then revealed in that tongue, and not until after a considerable lapse of time did Arabic become the language of Revelation….

-Bahá'u'lláh, Gleanings From the Writings of Bahá’u’lláh, pp. 173-174