Why can't I spell after my stroke?
Trouble writing and spelling after a stroke is called agraphia. It often comes with aphasia because writing uses the same language system as speaking. It is common, and it can improve with practice.
Does spelling practice help speech too?
It can. Spelling and speaking share the same underlying word store, so strengthening the written route can support the spoken one — one reason speech therapists include writing work in aphasia treatment.
How often should I practice?
Little and often beats long and rare. Most clinicians suggest short daily practice — even 10 minutes counts.