Allowing the application to switch the language displayed in the menus,
can be done quite easily.  Simply detach the menu strip and replace the
strings in the intuitext structures as described above.  it may be
convenient to store some kind of index number in the menu and menuitem
userdata which can be used to retrieve the appropriate string for the
desired language.  After all the strings have been installed, call
layoutmenus() and setmenustrip().

If the application has the localized strings when the menus are being
created, it simply places the pointers to the strings and command
shortcuts into the appropriate fields of the newmenu structure.  the menus
may then be processed in the normal way.