That would handle it assuming:
A) I knew text had been entered, replaced, or deleted.
B) I had code that would recognize and parse sentences (probably focusing on
[punc][space][a-zA-Z] triplets).
But I'd much much much rather check a checkbox or set a settting and let the
spellcheck engine do it 🙂
It doesn't sound like anyone has done that. My guess is that it would be
very twitchy and distracting (to authors) code.