"If I tell one text editor widget about "Smalltalk," there's no reason why all of them across the system shouldn't know about it." It is on OS X. (Leaving asid

"If I tell one text editor widget about "Smalltalk," there's no reason why all of them across the system shouldn't know about it." It is on OS X. (Leaving aside software that implements its own spellchecking, of course.)