As far as I see, path usually consists of two items?

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@16943 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/BusinessTemplate.py

@@ -3653,8 +3653,12 @@ class MessageTranslationTemplateItem(BaseTemplateItem):
             if action == 'nothing':
               continue
           path = string.split(path, '/')
-          lang = path[-3]
-          catalog = path[-2]
+          if len(path) == 2:
+            lang = path[0]
+            catalog = path[1]
+          else:
+            lang = path[-3]
+            catalog = path[-2]
           if lang not in localizer.get_languages():
             localizer.manage_addLanguage(lang)
           mc = localizer._getOb(catalog)