There seems to be a number of programs that enable spell checking in any program (and thus also in RW if the sales pitch is to be believed). The first two in
https://www.google.dk/search?q=spell...ogram&ie=UTF-8 looks interesting. I haven't tried them - I was just thinking of how to enable spell check for people that wants it without diverting coding resources from core functionality and without making RW slower that it already is.