Is there an automation tool to syncronize Localized RC file with English RC files ?

Try this tool at
http://www.codeproject.com/tools/LocalizeRC.asp

Also many commercial translation software recognize
.rc file and create localized version automatically.

Since editing an .rc file is very simple inside dev
studio, it is expected of the developers to propagate
the changes from domestic .rc files to the localized
.rc file. All he have to do is open two windows
(resource editors) and copy paste the new
buttons/labels/strings etc to the other window. He can
leave them as English and the translators will pick up
the localized .rc file and translate the delta.

There use to be buggy tool in the earlier version of
vc++ SDK that sync localized .res files called RLMAN. I think microsoft
droped support for that tool. It is
not available anymore.