Form validation last validation

aahh thanks for your answer! I got it fixed now

Though I am struggling to get this working:
$this->form_validation->set_message('required', $this->lang->line('tb_err_field_required'));

Apparently you are not allowed to use language in set_message? How can I change the error message depending on what language the user has selected?

Thanks
- Reno

EDIT: I guess this has to be done in the form_validation.php file per language instead of a custom language file ? But I'd like to do this form dependent, without setting the language in the file itself :<