Hi Olivia,

Maybe this paper can help you ("inner speech" concept)

Article Luria’s classification of aphasias and its theoretical basis

With aphasias the language of the thoughts of the patients is the same as the language they articulate. This is seen when they are made to write down their thoughts, provided of course their writing ability is not affected due to paralysis of their writing arm. thanks.

Hi -- I've published a couple papers on this. Langland-Hassan et al. (2015) "Inner speech deficits in people with aphasia," Frontiers in Psychology. Sharon Geva has also done good work on this--e.g., Geva et al. : Article Inner Speech's Relationship With Overt Speech in Poststroke Aphasia