>>213081968dunno what that anon means exactly unless he's extrapolating on the artwork from giger or something else i am not aware of
however there were dropped ideas from the original alien early on that would have dallas or someone from the crew who ended up in the vents finding intially scratches on the vent walls but later on it would turn into a written language or a type of hieroglyphic as the alien would age since it essentially was a newborn coming into the world growing up very fast
i read about that on this blog https://alienseries.wordpress.com/
which has a lot of very cool behind the scenes posts about all the aliens media - some of it i haven't read about anywhere else though i'm likely not the most die hard alien fan - sorry i can't link the exact post right now but at the very least all the posts about each film are tagged so you can just pick through each film on it's own if you'd like - highly recommend taking some time to do so if you like this sorta stuff