silverstripe-framework/admin/javascript/lang/en_US.js

if(typeof(ss) == 'undefined' || typeof(ss.i18n) == 'undefined') {
	if(typeof(console) != 'undefined') console.error('Class ss.i18n not defined');
} else {
	ss.i18n.addDictionary('en_US', {
		'LeftAndMain.CONFIRMUNSAVED': "Are you sure you want to navigate away from this page?\n\nWARNING: Your changes have not been saved.\n\nPress OK to continue, or Cancel to stay on the current page.",
		'LeftAndMain.CONFIRMUNSAVEDSHORT': "WARNING: Your changes have not been saved.",
		'SecurityAdmin.BATCHACTIONSDELETECONFIRM': "Do you really want to delete %s groups?",
		'ModelAdmin.SAVED': "Saved",
		'ModelAdmin.REALLYDELETE': "Do you really want to delete?",
		'ModelAdmin.DELETED': "Deleted",
		'ModelAdmin.VALIDATIONERROR': "Validation Error",
		'LeftAndMain.PAGEWASDELETED': "This page was deleted.  To edit a page, select it from the left."
	});
}