The user interface has been simplified in Dreamweaver CC and later. As a result, you may not find some of the options described in this article in Dreamweaver CC and later. For more information, see this article.
Use the Check Spelling command to check the spelling in the current document. The document must be a web page (for example, an HTML, ColdFusion, or PHP page). The Check Spelling command does not work on text files or XML files.
Additionally, the Check Spelling command 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.