Based on your screenshots, it seems the player can't render some assets properly. I don't know what exactly caused it, could be graphic driver, memory issue... well, I'm no renpy expert so I guess I can't help you with this one unless I can replicate it somehow...
What chinese episodes? You mean the chinese version? I don't play the chinese version so I don't know but it's the same game so I guess it's possible with some tweaking.
Hmm... you should check in 'raw_scenario/eidolon' folder to see if there's a desktop.ini file in there and delete it (turn on hidden file to be sure).
The 1_download_assets.py one.
That worked...I did a search and for some reason I had 349 desktop.ini files in the player folder. I deleted them all and now it works perfectly.
I don't think there is Chinese version of this game, maybe he taking about translate dialogue to Chinese. It's possible, but need someone who know Chinese to translate it.