I've downloaded, CuteEditor for Classic ASP, and have been looking at the Localization.asp page. When I set the culture as follows:-

 

editor.CustomCulture = "fr-fr"

 

The spell checker does not appear to be using the French dictionary? Try for example checking "Father". It does not appear as a spelling mistake so I can only assume it's using the English dictionary. Strangly when comparing this to the Localization demo page it does appear to change the dictionary correctly. Infact, you can see in the URL it sends a parameter to SpellCheck.aspx.

 

Please help.