You can perform a spell check in any application by recalling the Spell Checker window.

To spell check a piece of text in any document

1.Select the text you want to spell check

2.Press CTRL+SHIFT+F12
PhraseExpander opens the spell checker window

or

3.Right-click on the Tray Icon and click on Open Spell Checker window...
PhraseExpander opens the spell checker window

4.Choose the desired language and perform the spell check of the selected text

5.Click on Change to substitute the text with the corrected one

NOTE: you can change the shortcut used to call the spell checker in the Options > Shortcuts window.