I'm currently playing around with the RadEditor-Control.
And of course I want to use correct localizations.
In our existing solution, where this control is going to be used we use a ResourceProvider (https://msdn.microsoft.com/en-us/library/aa905797.aspx).
The telerik control uses this provider as it is declared in our web.config.
If the localization should work right, I'd have to copy all resource keys from the telerik resource files into our resource files which can or will result in duplicates.
To have the possibility to devide between our and your keys a customizable localization prefix would be nice.
At least I'd find it good, if your resource keys already had an prefix like "Tel_"...
I don't want to add an functionality for looking into different resourcemanagers.
Maybe I didn't search well enough to find a good and clean solution for this issue.
Thx in advance