CI_Form_validation::_translate_fieldname PHP Method

    protected function _translate_fieldname($fieldname)
    {
        // Do we need to translate the field name? We look for the prefix 'lang:' to determine this
        // If we find one, but there's no translation for the string - just return it
        if (sscanf($fieldname, 'lang:%s', $line) === 1 && FALSE === ($fieldname = $this->CI->lang->line($line, FALSE))) {
            return $line;
        }
        return $fieldname;
    }