I care for my Mum who has AD, but my husband also has aphasia resulting from surgery and treatment for a brain tumour 2004/2005. He will either be unable to get out the word he wants, or will mix up his words ( called our daughter Krusty instead of Kirstie ) or if he has a partial sizure he can actually not speak for a good 10 mns or so.
It is more evident when he is tired or stressed.
In the beginnng he was referred to a speech therapist, who first of all told me not to fill in his words for him, and give him the chance to express the words himself.
To think in his mind if possible maybe a picture of the word he was trying to say.
Last resort to write the word, or draw a picture.
I've often thought if his condition worsend and his speech deteriorated, whether it would be worth learning basic sign language?