Comment 30 for bug 997934

I should add, I realize there's more than one means to invoke spell checking, since a user could have the "check as you go" feature enabled, or they could explicitly start an interactive spell checking session. At a minimum, I think the latter should pop up a warning indicating it has no dictionary to work with. (And if a document has multiple languages, it could trigger multiple times, so I realize this isn't the simplest thing to make elegant...)