Really cool experience and interesting story! I really liked the puzzle-esque gameplay of trying to decipher the Eldritch language and it felt pretty rewarding to figure out some of the words myself.
My only complaint has already been addressed by a few other commenters, mainly the one where there's some dialogue with a lot of important information that can be skipped or missed without a way to read them again (I had to reload the save a few times). A suggestion is maybe something like a note is placed down with the translations once you receive the dialogue, or have it where the other characters will repeat themselves if you interact with them again?
But it's pretty exciting to know that this is just the first chapter now and that there's more to come >:)