diff --git a/mozilla/intl/locale/src/langGroups.properties b/mozilla/intl/locale/src/langGroups.properties
index 4ba56307469..65b11d94ea0 100644
--- a/mozilla/intl/locale/src/langGroups.properties
+++ b/mozilla/intl/locale/src/langGroups.properties
@@ -37,6 +37,21 @@
 # the terms of any one of the MPL, the GPL or the LGPL.
 #
 # ***** END LICENSE BLOCK *****
+#
+# References: http://www.omniglot.com/writing/atoz.htm
+#             http://www.loc.gov/standards/iso639-2/englangn.html
+#             http://www.ethnologue.com
+#             http://www.worldlanguage.com/Languages/
+#             http://www.rosettaproject.org/
+#             http://www.sweb.cz/ls78/diacritics.htm
+#    see also xpfe/global/resources/locale/en-US/languageNames.properties 
+#             and bug 178491
+#
+#ab=x-cyrillic
+# Strictly speaking, Avestan did not use Arabic script but Aramaic 
+# (arc)/Avestan script.)
+#ae=ar 
+
 af=x-western
 #am= #Ethiopic
 ar=ar