To configure options reguarding spelling and the user interface select Settings->Configure KWord from the Menu bar.
This will bring up a dialog box.
To configure the options for the speller, click on the button labeled Spelling.

If you place a check in the box labeled Create root/affix combinations not in dictionary, then when KWord encounters a root word in combination with either a prefix or a suffix for the combined word, KWord will add a new entry to your dictionary. If this is not checked, then KWord will continue to report this word as a misspelled.
The next check box down will flag words that have been combined. Examples of such words are shutout, cannot, and blackout.
Leaving this check box unchecked will prevent KWord from flagging website and email addresses for spelling errors. These addresses often contain words run together.
The Dictionary dropdown box is used to select the dictionary you want KWord to use.
The Encoding dropdown box can be used to specify which character set you want the speller to use.
The Client dropdown box is used to specify the spell checking program that KWord should use.
When you are happy with the changes, simply click OK.
If you click on Cancel, all changes will be lost.
Clicking on the Default button restores all values to their default values.
Clicking Interface will allow you to change the following.

By using the checkbox labled Show Rulers to toggle the rulers on the KWord screen.
The remainder of the controls are a can either be operated using the combo box arrows, entering the value directly or by sliding the slider to the right of the combo box.
You can use this to adjust how often KWord saves a temporary file. If you set this value to zero, KWord will not autosave. You can adjust the autosave from zero to 60 minutes.
This determines the maximum number of files that are listed under File->Open Recent command. You can adjust this value from 1-20.
When you are happy with the changes, simply click OK.
If you click on Cancel, all changes will be lost.
Clicking on the Default button restores all values to their default values.