THat is, those annoying occurrences at the beginning of sentences. These sort of typos crop up frequently for me.
I have a feeling the answer to this one is going to be, “If it’s not part of the OS X text system…”
But you could do it for common words using TextExpander or similar. You could also write a script to do it with a regular expression and make it a service using ThisService.
It’s not part of the OS X text system. 
Yeah, sorry, but Scrivener only does limited auto-correct, as it’s not really intended as a fully-fledged word processor.
Thanks for your suggestion, though,
Best,
Keith