One unfortunate flaw
This is a well-acted, absorbing, and touching story which is impaired by A TERRIBLE PRESENTATION OF THE SUBTITLES. As near as I could tell, the subtitles of foreign-language dialog were fine in terms of content, but they were inscrutable because of the way they failed to stand out from the complex background.
Unfortunately I don't know how you fix this. If they had put a big black or white background block behind the subtitles, it would have spoiled the impressive visuals of the scenes. I do think they could have improved the readability by using block characters with a contrasting outline.