Deep research work @cryptogee. You are a researcher. Nice work. As much as I would love to know about the prognosis of Albert; I think sticking with French language will be better for me because for someone who can't make a comprehensive statement, learning something new might be difficult. From the case study, the cerebral hemisphere was damaged which also is the part of the brain responsible for cognitive functions including learning. So I feel it would be best to stick to what he already knows since it works for him.
RE: The Man Who Forgot How To Speak - Treating Wernicke's Aphasia Through Non Dominant Language, A Live Study