This picture is different: it shows some sort of writing, presumably the language of whoever was contacting the contactees. There seem to be four words: two letters, three letters, two letters, three letters. And there are four symbols; the equal signs indicate there’s a correlation between the words and symbols. At first I took the words for garbled solfeggio, but the symbols don’t seem to fit.
Perhaps the symbols are meant to resemble cuneiform. That would certainly fit the Mesopotamian theme I’ve alluded to here.