>>124881>We can look at a wall relief from 5000 years ago and work out an approximation of what it was saying just by looking at it,No, we can't.
Without the rosetta stone, we would have no idea what any of these ancient scripts are saying. But there is only one rosetta stone, and many ancient texts. For most of them, we can only acknowledge that they look like actual writings, and that they are probably not the prehistoric equivalent of random key-bashing.
"Pre-historic" is a fascinating term in that regard. It's only pre-historic because we have no idea what they wrote.
On topic:
I think very basic image and music formats have the best chance at being resurrected (if the data itself survives). Of course, they probably won't look or sound anything like what they used to, given that they are being reproduced on completely different hardware with no output control in between generations.
But for example bitmaps encode every single pixel into a number. They are technically just a long stream of pixels.
If you split that stream at the right points, you get a sensibly looking image (just from the coherence of shapes), even if the colors are all completely wrong. Once you have a set of 10k such images, you can make educated guesses on what the correct colors would be.
This would hold true even in a speculative future where no one has any idea of today's languages. If they dig up some old physical data carriers from one of those long-term data storage centers we are setting up, they will probably be able to figure this shit out.