More than a quarter of a million people in the UK have problems with speaking, reading, writing or understanding language.
This communication disability is caused by damage to the language centres of the brain. It can come as the result of a stroke, head injury, brain tumour or other neurological illness. It should be noted that intellect is rarely affected.
The medical term for this is Aphasia (or Dysphasia).
Speakability is the national charity dedicated to supporting and empowering people with Aphasia and their carers.