Nope.
I copied the the confirm-template code in ad form and made a similar spellcheck-template functionality. That might be a bad idea, though. I think being able to specify both templates concurrently is needed because the user might hit "OK" instead of "Check" and should be shown the confirm-template. If "Check" is clicked the spellchecker will provide its own confirmation (that's how it is now anyway) and the real confirm-template won't be displayed on top of that...
Hmm... Maybe it is possible to integrate with acs-templating/resourses/forms/confirm-button.* in some way...
