Hello Simon, I wish you good luck with the translation and what I have seen from the online-translation you have provided, it certainly looks like the ultimate puzzle...?
... Perhaps you could try and ask someone who understands the language i.e. Korean Community Center etc. to figure out what the family writes to you and please take into account the very delicate political division which might make it difficult for the family if you would ask the Embassy for some help with the translation ?
I wish you good luck with your new kidney (
) and also good luck with the translation of this letter from Kristina.