Sonnet is the spelling checker used by KDE applications such as Kate, KMail, and KWord. It is a GUI frontend to various free spell checkers. More Information about required spell checkers and dictionaries you find in the documentation of the System Settings module Spell Checker.
The best guess is shown to the right of Replace with. To accept this replacement, click on .
You may also select a word from the list of suggestions and then click to replace the misspelled word with the selected word. To add more suggestions from the dictionary to the suggestions list click the button.
To keep your original spelling, click on Ignore.
To stop the spellchecking -- keeping the changes you've already made -- click on .
To stop the spellchecking and cancel the changes you've already made, click on .
Clicking on will initially perform the same function as clicking on , but will automatically replace the misspelled word with the chosen replacement word, if it appears again (at a later point) in your document.
The button ignores this and all future occurrences of the misspelled word.
Clicking on will add the misspelled word to your personal dictionary (this is distinct from the original system dictionary, so the additions you make will not be seen by other users).
The drop down box Language at the bottom of this dialog allows you to switch to another dictionary temporarily.
The default configuration options are available in the System Settings module Spell Checker.