[16.0][FIX] account_credit_control: translate credit line table in emails

account_credit_control/models/credit_control_communication.py

@@ -176,6 +176,10 @@ def _generate_comm_from_credit_lines(self, lines):
         return comms
 
     def _get_credit_control_communication_table(self):
+        # Force context to contact's language before rendering strings
+        lang = self.contact_address_id.lang or "en_US"
+        self = self.with_context(lang=lang)
+
         th_style = "padding: 5px; border: 1px solid black;"
         tr_content = "<th style='%s'>%s</th>" % (th_style, _("Invoice number"))
         tr_content += "<th style='%s'>%s</th>" % (th_style, _("Payment Reference"))

account_credit_control/tests/__init__.py

@@ -3,3 +3,4 @@
 from . import test_res_partner
 from . import test_account_move
 from . import test_credit_control_run
+from . import test_credit_control_communication_translation

account_credit_control/tests/test_credit_control_communication_translation.py

@@ -0,0 +1,66 @@
+# Copyright 2026 360ERP (<https://www.360erp.com>)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo.tests import tagged
+from odoo.tests.common import TransactionCase
+
+from odoo.addons.base.tests.common import DISABLED_MAIL_CONTEXT
+
+
+@tagged("post_install", "-at_install")
+class TestCreditControlCommunicationTranslation(TransactionCase):
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        cls.env = cls.env(context=dict(cls.env.context, **DISABLED_MAIL_CONTEXT))
+
+        # Activate Dutch language
+        cls.env["res.lang"]._activate_lang("nl_NL")
+
+        # Create partner with Dutch language set
+        cls.partner_nl = cls.env["res.partner"].create(
+            {
+                "name": "Dutch Test Partner",
+                "lang": "nl_NL",
+            }
+        )
+
+        # Setup policy and communication record
+        cls.policy = cls.env.ref("account_credit_control.credit_control_3_time")
+        cls.policy_level = cls.env.ref("account_credit_control.3_time_1")
+        cls.policy_level.mail_show_invoice_detail = True
+
+        cls.communication = cls.env["credit.control.communication"].create(
+            {
+                "partner_id": cls.partner_nl.id,
+                "contact_address_id": cls.partner_nl.id,
+                "policy_level_id": cls.policy_level.id,
+                "currency_id": cls.env.company.currency_id.id,
+                "company_id": cls.env.company.id,
+            }
+        )
+
+    def test_communication_table_language_propagation(self):
+        """Verify _get_credit_control_communication_table uses partner's lang."""
+        # Generate table
+        table_html = self.communication._get_credit_control_communication_table()
+
+        # Check headers that are reliably translated in the standard nl_NL locale
+        self.assertIn(
+            "Factuurnummer",
+            table_html,
+            "The context switch failed: 'Invoice number' was not translated.",
+        )
+        self.assertIn(
+            "Vervaldatum",
+            table_html,
+            "The context switch failed: 'Due date' was not translated.",
+        )
+
+    def test_communication_table_fallback_lang(self):
+        """Verify table falls back gracefully when contact has no lang set."""
+        self.partner_nl.lang = False
+        table_html = self.communication._get_credit_control_communication_table()
+
+        # Fallback to source English strings
+        self.assertIn("Invoices summary", table_html)