Hello and hope you are doing well.
Helping a person recover from stroke is collectively termed as stroke rehabilitation. For the motor skills physiotherapy is needed. Techniques such as exercise, manipulation, massage, skills training and electrical treatment are used. Consult a neuro physiotherapist and follow the instructions at home. To improve memory functions, you could try a lot of ‘brain teasers’. The brain can retain only a certain number of ‘facts’ and everything else is recalled based on its relationship with these facts. Make him say small words, repeating them, he can try small arithmetical calculations and build up from there. You can talk to your primary care physician, he can guide you to professionals. And you could follow up at home.
Hope this helped and do keep us posted.