It's a well known concept that there were 70 nations and 70 original languages. Is there any agreement about which ones they were/are? I found this which lists the nations, but I'm interested in languages also, and knowing if there is disagreement about this issue among the commentators.
The number 70 in the time of Chazal was a "typological number" meant to convey a generic large number, much like people today use the term "millions" even if they do not actually mean that many.
Thus, you find in the Talmud many instances of the number 70 which are clearly not meant to be exactly 70:
You can find many such instances in the Tanach as well:
In all of the above, 70 is meant as a general term for "many", not a specific number, so that searching for a specific list of all 70 languages is rather futile.