Seek out and remove all checkspelling="false" attributes. This restores default behavior, i.e., does not turn on spellcheck for text inputs.
< Feedback on Always Can Check Spelling
Sounds like the script needs to monitor for newly opened editing areas that don't exist at the time the page loads. Hmm...
This script rocks!
but it doesn't work on certain sites with an additional click for the FB comment section such as USATODAY.