/**
  * Default validate submit.
  *
  * @since 1.0.0
  *
  * @return bool|WP_Error
  */
 public static function default_validate()
 {
     $errors = new WP_Error();
     if (!empty($_POST['g-recaptcha-response'])) {
         $validate = Recaptcha_Lightweight_Adaptation_API::validate($_POST['g-recaptcha-response']);
         //$validate = Recaptcha_Lightweight_Adaptation_API::validate( 'jkhkjh' );
         // Not a robot
         if ($validate === true) {
             return true;
         } elseif (is_wp_error($validate)) {
             if (!empty($validate->errors)) {
                 foreach ($validate->errors as $code => $new_error) {
                     $errors->add($code, '<strong>ERROR</strong> ' . $new_error[0]);
                 }
             } else {
                 // We have errors object but no errors inside.
                 $errors->add('unknown_result_of_recaptcha_validation', __('<strong>ERROR</strong> Unknown result of the Recaptcha Light Adaptation plugin validation process.', 'recaptcha_lightweight_adaptation'));
             }
         } else {
             // Unknown result after validation
             $errors->add('unknown_result_of_recaptcha_validation', __('<strong>ERROR</strong> Unknown result of the Recaptcha Light Adaptation plugin validation process.', 'recaptcha_lightweight_adaptation'));
         }
     } else {
         $errors->add('missing_recaptcha_code', __('<strong>ERROR</strong>. Check „I’m not a robot“ checkbox.', 'recaptcha_lightweight_adaptation'));
     }
     return $errors;
 }