It used to be easy. As stated in de WebDesigner manual:
"Web Designer's spell checker is based on the Open Source Hunspell library used without any modifications under the Mozilla Public License Version 1.1. You can find a copy of the Mozilla Public License in the file MPL-1.1.txt in the "dict" folder of your Web Designer installation and a copy of the Hunspell source code at
http://hunspell.sourceforge.net/. "
I used to head over to that site and copy the necessary .aff and .dic files and put them in the /dict folder. They would be recognised with the restart of Xara.
But with the newer versions it isn't the case anymore. Somewhere in the development of XDP one decided this should be difficult....
But there's a workaround:
https://www.talkgraphics.com/showthr...Designer/page2 the second last post bu HayTay mentions the good old trick with substitution files ...