Spellchecker preferences control the interaction between the application and either Microsoft Office or Hunspell. Either option requires software installation on your computer.
To configure and enable Spellchecker:
Click Spellchecker in the General Preferences group.
Select Enable Spellchecking to enable Spellchecker.
Alert:
Deselect Enable Spellchecking to disable Spellchecker. Disabling Spellchecker clears all Spellchecker preferences. You must reconfigure your preferences when you re-enable Spellchecker.
(Optional) Select Check for spelling errors as you type and configure for Microsoft Office or Hunspell, based on your installation.
Note:
To install Hunspell, go to Help > Wordfast Pro Update, choose the required language JAR, and click Update. Select Hunspell for any of the following languages after you install it.