I am well aware of the history of language. I have studied language extensively, Probably as much or more than you have studied mathematics and physics.
Do you think that history of language is true?
The shared words and meanings were encoded into the Bible, long before actual dictionaries were assembled.
Some words are invented with no apparent root I will give you that, Nonetheless they still contain alphabet letters or symbols which are derived from the said language. These are the seed of language. When you plant them they are established.