diff -r 3ea177e986a6 -r 1219fe3dd3a8 src/pyams_i18n/interfaces/__init__.py
--- a/src/pyams_i18n/interfaces/__init__.py	Wed Jun 17 09:57:10 2015 +0200
+++ b/src/pyams_i18n/interfaces/__init__.py	Wed Jul 01 10:08:34 2015 +0200
@@ -85,7 +85,7 @@
 
     languages = List(title=_("Content languages"),
                      description=_("List of languages available for this content"),
-                     required=True,
+                     required=False,
                      value_type=Choice(vocabulary='PyAMS base languages'))