Hi,
Thanks for your interest in Syncfusion products,
Refer the following documentation links to apply language settings to EditControl,
http://help.syncfusion.com/UG/User%20Interface/WPF/Edit/Documents/458customlanguagesup.htmhttp://help.syncfusion.com/UG/User%20Interface/WPF/Edit/Documents/457languageconfigurations.htmPlease let us know if you have concerns on this,
Regards
Vallarasu S.