I have been thinking about this question.
In regard to this specific case, I would consider that an application to use something like the Franklin Speaking Wordmaster to assist the person in reading the questions on the exam paper could be permitted by the Authority.
The Franklin Speaking Wordmaster is an electronic device that contains a thesaurus. When the user types in a word this is pronounced by the device and it is displayed on the screen.
The advantage of permitting this when compared to permitting a reader is that following qualification the person can continue to use the device to for example read notams pre-flight etc.
Regards,
DFC