diff --git a/contract/i18n/contract.pot b/contract/i18n/contract.pot
index 2849eead78..83324a2203 100644
--- a/contract/i18n/contract.pot
+++ b/contract/i18n/contract.pot
@@ -2334,6 +2334,13 @@ msgstr ""
 msgid "You must supply a date of next invoice for contract line '%s'"
 msgstr ""
 
+#. module: contract
+#. odoo-python
+#: code:addons/contract/models/contract.py:0
+#, python-format
+msgid "by contract"
+msgstr ""
+
 #. module: contract
 #: model_terms:ir.ui.view,arch_db:contract.contract_contract_form_view
 msgid "e.g. Contract XYZ"
diff --git a/contract/i18n/es.po b/contract/i18n/es.po
index 323510e097..2fb2c543a3 100644
--- a/contract/i18n/es.po
+++ b/contract/i18n/es.po
@@ -2543,6 +2543,13 @@ msgstr ""
 "Debe proporcionar la fecha de la próxima factura para la línea del contrato "
 "'%s'"
 
+#. module: contract
+#. odoo-python
+#: code:addons/contract/models/contract.py:0
+#, python-format
+msgid "by contract"
+msgstr "por el contrato"
+
 #. module: contract
 #: model_terms:ir.ui.view,arch_db:contract.contract_contract_form_view
 msgid "e.g. Contract XYZ"
diff --git a/contract/models/contract.py b/contract/models/contract.py
index 5b2b0ab596..036270315a 100644
--- a/contract/models/contract.py
+++ b/contract/models/contract.py
@@ -619,17 +619,12 @@ def _invoice_followers(self, invoices):
     def _add_contract_origin(self, invoices):
         for item in self:
             for move in invoices & item._get_related_invoices():
+                translation = _("by contract")
                 move.message_post(
                     body=(
-                        _(
-                            (
-                                "%(msg)s by contract <a href=# data-oe-model=contract.contract"
-                                " data-oe-id=%(contract_id)d>%(contract)s</a>."
-                            ),
-                            msg=move._creation_message(),
-                            contract_id=item.id,
-                            contract=item.display_name,
-                        )
+                        f"{move._creation_message()} {translation} "
+                        f"<a href=# data-oe-model=contract.contract"
+                        f" data-oe-id={item.id}>{item.display_name}</a>."
                     )
                 )