diff --git a/product/ERP5Form/MultiRelationField.py b/product/ERP5Form/MultiRelationField.py
index 92580de886682c4de06d7c749a9a3621ca84de2e..24d8b299addaed542dca2cc1ef3eb17b6bf91e3a 100755
--- a/product/ERP5Form/MultiRelationField.py
+++ b/product/ERP5Form/MultiRelationField.py
@@ -439,7 +439,9 @@ class MultiRelationStringFieldValidator(Validator.LinesValidator,  RelationField
                 # Get the query results
                 relation_list = portal_catalog(**kw)
                 relation_uid_list = map(lambda x: x.uid, relation_list)
-
+                translation_service = getToolByName(field,
+                                                    'translation_service',
+                                                    None)
                 # Prepare a menu
                 if translation_service is not None:
                   N_ = translation_service.translate