What an unfortunate situation for this patient.
Having worked as a medical interpreter/translator since 2014, I've had to be involved in all manners of situations, including end-of-life decisions by the parties involved. In most cases, folks sign advance directives and/or informed consent documents prior to complicated procedures.
I've seen hospitals show extreme flexibility in favor of patients, legal or undocumented. Although I must confess I've yet to assist ELP folks in public hospitals.
Now, although I'm a bleeding-heart nincompoop, at times I've been outraged at the demands (too many to mention) made by some patients and relatives, especially, and including, some undocumented folks for whom I have interpreted.