Index: includes/bootstrap.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/bootstrap.inc,v
retrieving revision 1.333
diff -u -p -r1.333 bootstrap.inc
--- includes/bootstrap.inc	7 Dec 2009 07:25:24 -0000	1.333
+++ includes/bootstrap.inc	21 Dec 2009 10:37:45 -0000
@@ -181,9 +181,9 @@ define('DRUPAL_KILOBYTE', 1024);
 /**
  * The language code used when no language is explicitly assigned.
  *
- * Defined by ISO639-2 for "No linguistic content / Not applicable".
+ * Defined by ISO639-2 for "Undetermined".
  */
-define('LANGUAGE_NONE', 'zxx');
+define('LANGUAGE_NONE', 'und');
 
 /**
  * The type of language used to define the content language.
Index: modules/menu/menu.test
===================================================================
RCS file: /cvs/drupal/drupal/modules/menu/menu.test,v
retrieving revision 1.28
diff -u -p -r1.28 menu.test
--- modules/menu/menu.test	14 Dec 2009 20:23:01 -0000	1.28
+++ modules/menu/menu.test	21 Dec 2009 10:41:59 -0000
@@ -555,9 +555,10 @@ class MenuNodeTestCase extends DrupalWeb
 
     // Create a node.
     $node_title = $this->randomName();
+    $language = LANGUAGE_NONE;
     $edit = array(
-      'title[zxx][0][value]' => $node_title,
-      'body[zxx][0][value]' => $this->randomString(),
+      "title[$language][0][value]" => $node_title,
+      "body[$language][0][value]" => $this->randomString(),
     );
     $this->drupalPost('node/add/page', $edit, t('Save'));
     $node = $this->drupalGetNodeByTitle($node_title);
Index: modules/node/tests/node_test_exception.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/node/tests/node_test_exception.module,v
retrieving revision 1.2
diff -u -p -r1.2 node_test_exception.module
--- modules/node/tests/node_test_exception.module	4 Dec 2009 16:49:47 -0000	1.2
+++ modules/node/tests/node_test_exception.module	21 Dec 2009 10:42:31 -0000
@@ -11,7 +11,7 @@
  * Implements hook_node_insert().
  */
 function node_test_exception_node_insert($node) {
-  if ($node->title['zxx'][0]['value'] == 'testing_transaction_exception') {
+  if ($node->title[LANGUAGE_NONE][0]['value'] == 'testing_transaction_exception') {
     throw new Exception('Test exception for rollback.');
   }
 }