At times it might be useful to deliberately include spelling mistakes in a query in order to pick up what internet users are saying about a subject. On other occasions you may want only to include correctly spelled words.
When writing or editing a query in an agent, there is a spell check button which will, when activated, indicate which words are misspelled.
In this first image, the spell check is off. All of the words (correctly spelled or not) are presented in the same manner.
In the second image, the spelling button has been activated:
Any words that are incorrectly spelled are now underlined in red.
You can choose different languages for the spell checker: