I'm not having the same issue - did you check Preferences - Content - Languages? You could also install the addon After the Deadline until your onboard spell check is working again.
p.s. 'addon' and 'onboard' are being shown as spelling errors as I type this.
I'm not having the same issue - did you check Preferences - Content - Languages? You could also install the addon After the Deadline until your onboard spell check is working again.
p.s. 'addon' and 'onboard' are being shown as spelling errors as I type this.