Note this is from a personal developmental perspective
For someone like me who got diagnosed with Autism in 2010 and later in Scotopic sensitivity syndrome with Visual agnosias (object, meaning and face blindness) as well as Visual-Verbal agnosia (comprehension blindness) and associated learning difficulties this is what I can relate to – I had oral apraxia compacted by auditory and visual processing disorders I saw (and still in the present without my tinted lenses) shapes, movements, colours and blobs and couldn’t contextualise where I was in space and time what I was doing (learning by route was a system I learnt) – I had speech and language delay as well as significant motor delays, echolalia and late speech compacted on my ability to understand typical language
I had NO contextual words within my head for along time (even though the capacity was there and I would have gleaming moments of clarity which no one saw or noticed) but I recited jingles, sounds, hums and treated words like “sounds” nor could I visualise words either.
I relate to Donna Williams in this way and it’s important to debunk the myth that all people on the spectrum are thinking in pictures when many clearly aren’t. I still find typical language difficult but I can but try to integrate as much as possible.
One must also differentiate and language processing disorder from mutism it was ironic though when I gained functional speech I had bouts of mutism so the two can interact.
I also have and Autie based profile as opposed to Aspie and this may certainly be one of the reasons why.
Paul Isaacs Adult With Autism 2014