If you have modified the language files, and are running into the issue where AShop's local order form page is being submitted without checking to see if the form is filled out. It could be caused by any forward slashes / in the constant values that you translated in the orderform.inc.php language file. Sometimes when uploading the language file commas ' can be replaced by a forward slash and comma combination /'
Check the orderform.inc.php language file and be sure that it does not have any forward slashes in the constant values.