Multilingual spell checker behavior seems to depend to user environment too much - for example, it allows "wellcome" spelling on my machine.
Created attachment 250594 [details] proposed patch Let's see what EWS thinks...
Comment on attachment 250594 [details] proposed patch Clearing flags on attachment: 250594 Committed r182666: <http://trac.webkit.org/changeset/182666>
All reviewed patches have been landed. Closing bug.