Thank you for posting your query.
It is unfortunate that your father has suffered a massive brain stroke
of the left side of brain.
This has resulted in right sided weakness and inability to speak/understand.
The recovery is going to be delayed and incomplete. Regular physiotherapy
and speech therapy
would be very useful in ensuring good recovery.
I hope my answer helps. Please get back if you have any follow up queries or if you require any additional information.
Wishing you good health,
Dr Sudhir Kumar MD (Internal Medicine), DM (Neurology)
Senior Consultant Neurologist
Apollo Hospitals, Hyderabad, India
Click on this link to ask me a DIRECT QUERY: http://bit.ly/Dr-Sudhir-kumar
My BLOG: http://bestneurodoctor.blogspot.in