Hi Walter,
Thanks for using Syncfusion Products.
We have prepared a simple sample with our Docking Manager to localize the context menu items and you can download the sample from the attached file.
In this sample, we have changed the culture to "German" for localization and you can refer the following reference link also.
Reference Link: http://help.syncfusion.com/ug/wpf/tools/default.htm#!documents/localizationsupport.htm
Could you please let us know if this sample meet your requirement or not?
Regards,
Muthalagu
DockingManagerLocalization_109293_72d746c7.zip