Index: includes/bootstrap.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/bootstrap.inc,v
retrieving revision 1.333
diff -u -r1.333 bootstrap.inc
--- includes/bootstrap.inc	7 Dec 2009 07:25:24 -0000	1.333
+++ includes/bootstrap.inc	18 Dec 2009 10:48:25 -0000
@@ -181,9 +181,9 @@
 /**
  * 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.