se of undefined constant CBV_DOMAIN

@@ -240,18 +240,18 @@ class Validation extends Common\Validation {
      */
     protected function username($val) {
         if (empty($val)) {
-            throw new Exception('<li>'.__('Username is blank', CBV_DOMAIN).'</li>');
+            throw new Exception('<li>'.__('Username is blank', 'CBV_DOMAIN').'</li>');
         }
 
         require_once(ABSPATH . WPINC . DIRECTORY_SEPARATOR . 'registration.php');
         if (!validate_username($val)) {
             throw new Exception(
-                '<li>'.__('Username must be at least 4 characters, letters and numbers only', CBV_DOMAIN).'</li>'
+                '<li>'.__('Username must be at least 4 characters, letters and numbers only', 'CBV_DOMAIN').'</li>'
             );
         }
 
         if (username_exists($val)) {
-            throw new Exception('<li>'.__('Username already exists', CBV_DOMAIN).'</li>');
+            throw new Exception('<li>'.__('Username already exists', 'CBV_DOMAIN').'</li>');
         }
     }
 
@@ -262,18 +262,18 @@ class Validation extends Common\Validation {
      */
     protected function password($val) {
         if (empty($val)) {
-            throw new Exception('<li>'.__('Password can not be blank', CBV_DOMAIN).'</li>');
+            throw new Exception('<li>'.__('Password can not be blank', 'CBV_DOMAIN').'</li>');
         }
 
         if (isset($val[PASS_MAX_LEN])) {
             throw new Exception(
-                '<li>'.sprintf(__('Password can not be longer than %d characters.', CBV_DOMAIN), PASS_MAX_LEN).'</li>'
+                '<li>'.sprintf(__('Password can not be longer than %d characters.', 'CBV_DOMAIN'), PASS_MAX_LEN).'</li>'
             );
         }
 
         if (preg_match('/(\\\\|\\\'|"| )+/i', $val)) {
             throw new Exception(
-                '<li>'.__('Password can not contain spaces, backslashes (\) or quotes', CBV_DOMAIN).'</li>'
+                '<li>'.__('Password can not contain spaces, backslashes (\) or quotes', 'CBV_DOMAIN').'</li>'
             );
         }
     }
@@ -284,11 +284,11 @@ class Validation extends Common\Validation {
      */
     protected function email($val) {
         if (!(boolean)filter_var($val, FILTER_VALIDATE_EMAIL)) {
-            throw new Exception('<li>'.__('Invalid email address', CBV_DOMAIN).'</li>');
+            throw new Exception('<li>'.__('Invalid email address', 'CBV_DOMAIN').'</li>');
         }
 
         if (false !== email_exists($val)) {
-            throw new Exception('<li>'.__('Email address already registered', CBV_DOMAIN).' </li > ');
+            throw new Exception('<li>'.__('Email address already registered', 'CBV_DOMAIN').' </li > ');
         }
     }
 }