Hello Kanusta,
I am sorry you are going through this. Is the patient a friend, or loved one? Is he, or she still in the hospital?
I had similar effects following my strokes, as far as the mixed up words, and nonsense words. It can be very frustrating to mix up letters and words, and end up with gibberish. I can tell you that my speech has gotten much better after I started typing, here on the boards.
As far as the fever goes, I do not know the origin. I would leave it up to the hospital to monitor it, and treat it. Have you asked them about the fever? Stroke is a brain attack, and can cause all kinds of secondary issues.
If there is anything we can do here for you, please feel free to ask, OK?