please have a look at the attached screenshot. This was taken on a german Windows and there are lots of strings of the RadColorBox that must be localizable in my opinion.
I've found the following way to set at least the text of some labels:
But doing this for 10 or more RadColorBox elements can't be the right way.
The names of the Colors seems to be ok, to be in English, since they come from a .net enumeration.