Use Spell Check to check the spelling in the current document.
The document must be a web page (for example, an HTML, ColdFusion, or PHP page).
Spell check does not work on text files or XML files.
Additionally, when you use Spell check, it ignores HTML tags and attribute values.
Dreamweaver can only spell check the file that is currently open in the Document window. It cannot spell check all of the files in a site simultaneously.
By default, the spelling checker uses the U.S. English spelling dictionary. To change the dictionary, select Edit > Preferences > General (Windows) or Dreamweaver > Preferences > General (Macintosh), then in the Spelling Dictionary pop‑up menu select the dictionary you want to use.
Dreamweaver does not provide a way of deleting entries that have been added to personal dictionaries.