It's likely the sea stains were erased just after the Tower of Babel.
Why? For what purpose?
Sea stains are a form of language
Only if you expand the definition of language to such a point that it concievibly covers everything. But in the traditional and accepted definition for a language water stains are no more a "language" than the color of shit is.
and it would have been confounded like everything else.
I must point out that confounded does not mean erased out of existence. If the water stains were simply "confounded" they would still exist in some form.
how are they considered language?
By twisting the meaning of the word so that it applies to you preconcieved conclusions, regardless of the fact that the word, under your "definition, no longer has any practical scope or meaning.
well they convey meaning and anything (that is everything) conveys meaning in the universe
That's all well and good, but that is not the traditional or accepted definition of "language". Such a broad and all encompassing definition effectively renders the word meaningless. Everything conveys meaning of some sort, horseshit can convey meaning, but you don't call that a language, that is, unless it's conveniant to your agenda, then it's a language, right?
So it really does not matter if you do the research or not,
Yes, it does matter. Just because you redefine a word to suit your agenda doesn't means that you can then just dismiss the research as if it has no bearing.
if sea stains aren't found it's due to CONFOUNDATION not because they were never there.
If it were "confounded" then it would continue to exist, not magically erased, Further more, The bible does not state, infer, or insinuate that written languages were likewise confounded, nor does it claim such a broad meaning for the word "language". In fact you're definition of "language" (Which seems to say that everything is considered to be a language according your overbroad and essentially meaningless definition.) would leave everything virtually incomprehensible to everyone were it to be "confounded".