Extending Form Validation Library

[eluser]ahmadalyan[/eluser]
I'm Working now on Multi-Language website so when i try to use form validation library i had put the validation rules in config file

Code:

$config = array(
           'add_recored' => array(
                                    array(
                                            'field' => 'user_type_name',
                                            'label' => 'lang:err_user_type_name',
                                            'rules' => 'required|min_length[3]|xss_clean'
                                         )
                                    )
               );

know i want to but the error massage in this rule array can any tell me how to implement this

Ie:

Code:

$config = array(
           'add_recored' => array(
                                    array(
                                            'field' => 'user_type_name',
                                            'label' => 'lang:user_type_name',
                                            'rules' => 'required|min_length[3]|xss_clean',
                                            'label' => 'lang:err_user_type_name'
                                         )
                                    )
               );

and when it has an error i want to display this error msg