Hi! Sumsero had the right idea, they aren't any specific letters more just meant to look like garbled Necronomiconic weird nonsense. Since the characters aren't in any specific language (I believe most are actually unicode symbols) nor translates to anything, and more just typed to look like garbled text, we left it as is.
I haven't played this game either, but I heard that these strange words can be found in the hidden room of the screening room in the game(I'm not sure what English will translate into, maybe it's a place where you can watch videos or something like that?) as a comparison to Japanese 50 tone(日语50音/ごじゅうおん)
This answer comes from 2016, and like the official text above, mentions the "死灵之书(Necronomicon) ",so I think this answer may be related to this question
