Thanks for the updated patch Helly!
I have a question for you regarding the Golden Temple: after you complete the first puzzle (the V9 one with the switches) and unlock the secret room in the forest with the treasures, there's some kind of light sphere with a force field that doesn't let me proceed further, and an inscription with some gibberish and "mz 412 04 27". What exactly is required to proceed? Even Sizz was confused

I would leave the issue for later, but it seems you can't return to the Golden Temple once you leave. The Golden item set found in the secret room is also kinda underwhelming, which makes me think there's more to those ruins.
I have also noticed the books (or at least some of them) seems to be translated on the site you linked, even with Google Translate the book about Emperor Pal mostly made sense.