IMO a speech therapist may be a very good thing. They help with memory issues. The same area of the brain that stores short term memory information is also used for speech. So even though it may not seem related they are. I am way to new to this injury to have much understanding of the very long term affects. It may be more difficult to re-adjust so long post injury. But what do you have to lose? You may very well be able to benefit. I would give it a try and then decide for yourself.