Ya know, it doesn't sound like plain ole depression since she had so much trouble understanding simple words. Maybe she had been sleeping under the influence of meds and was still out of it? Drug use sure is possible. But you mentioned she kept looking off to the side...that makes me wonder if she was seeing something you weren't? Maybe she has had some sort of psychotic slip? Related to depression or otherwise? So hard to know, and just soooo sad.

Perhaps you will be able to contact her family and sort it out prior to your next visit? Take care of yourself! That must have been really difficult to see your friend so unwell!

emmy