Hi Ray,
Thank you for contacting Syncfusion Support
Could you please ensure and let us know you are using ChromelessWindow or RibbonWindow? So that we would provide assistance according to your reply.
Also we have attached a sample here using ChromelessWindow. In this sample, we have provided string values in the Resource file for the French culture and applied this culture in the application
Please download the sample from the below link
Sample link :
LocalizationSamplePlease let us know if you need any other assistance
Regards,
M.Sugapriya