From the DevNet Resource Kit, Volume 10 description of the WA Auto Spell Check extension for Dreamweaver MX2004 (emphases added):
A single typo can turn the most professional-looking web page into an amateur production. With WA Spell Check, you catch your mistakes immediately and correct them with a click. This extension integrates completely with the built-in and personal dictionaries of Dreamweaver MX 2004, and it provides full international support. WA Auto Spell Check is a real timesaverand an on-the-job lifesaver: