Fix news without translations

newsbox_i18n/models.py

@@ -67,6 +67,8 @@ class NewsboxI18NBase(six.with_metaclass(NewsboxI18NModelBase, TranslatableModel
             language = current_language
 
         if language not in self.get_available_languages():
+            if not self.get_available_languages():
+                return None
             language = (list(self.get_fallback_languages()) + list(self.get_available_languages()))[0]
 
         activate(language)