I played around with the new titlecreen-skipping-Feature (option "NewGame=1") and combined with the support for the LoadMenu & ExitGame commands it looks like its possible to completely replace the default screen of RPG_RT. (Even the new EasyRPG settings page is accessible via RPG2k3s "Open Video Options" command)
But when using EasyRPGs translation feature, there seems to be no way around using the default title screen as there seems to be no other way to access this menu.
Would it be possible to create a custom command for this?