Hi,
Thank you for posting your query.
I have noted your mother's clinical details. I can understand your 
anxiety, however, I would like to reassure you that there are very good chances of her complete recovery.
As you have mentioned, she is recovering well from the 
stroke, and it seems to be a minor stroke affecting only her speech.
For 
pneumonia, she is on appropriate antibiotics, which would lead to complete resolution in most cases.
So, we can expect a good outcome here.
I hope my reply has helped you.
I would be pleased to answer, if you have any follow up queries or if you require any further information.     
Best wishes,
Dr Sudhir Kumar MD (Internal Medicine), DM (Neurology)
Senior Consultant Neurologist
Apollo Hospitals, Hyderabad,
For DIRECT QUERY to me:  http://bit.ly/Dr-Sudhir-kumar 
My blog: http://bestneurodoctor.blogspot.com/