[5.2.x] Fixed #36314 -- Fixed MinimumLengthValidator error message translation.

Regression in ec7d69035a.

Thank you Gabriel Trouvé for the report and Claude Paroz for the review.

Backport of d469db978e from main.

django/contrib/auth/password_validation.py

@@ -106,15 +106,20 @@ class MinimumLengthValidator:
 
     def validate(self, password, user=None):
         if len(password) < self.min_length:
-            raise ValidationError(self.get_error_message(), code="password_too_short")
+            raise ValidationError(
+                self.get_error_message(),
+                code="password_too_short",
+                params={"min_length": self.min_length},
+            )
 
     def get_error_message(self):
-        return ngettext(
-            "This password is too short. It must contain at least %d character."
-            % self.min_length,
-            "This password is too short. It must contain at least %d characters."
-            % self.min_length,
-            self.min_length,
+        return (
+            ngettext(
+                "This password is too short. It must contain at least %d character.",
+                "This password is too short. It must contain at least %d characters.",
+                self.min_length,
+            )
+            % self.min_length
         )
 
     def get_help_text(self):

docs/releases/5.2.1.txt

@@ -36,3 +36,7 @@ Bugfixes
 * Fixed a regression in Django 5.2 that caused improper values to be returned
   from ``QuerySet.values_list()`` when duplicate field names were specified
   (:ticket:`36288`).
+
+* Fixed a regression in Django 5.2 where the password validation error message
+  from ``MinimumLengthValidator`` was not translated when using non-English
+  locales (:ticket:`36314`).

tests/auth_tests/test_validators.py

@@ -1,4 +1,5 @@
 import os
+from unittest import mock
 
 from django.contrib.auth import validators
 from django.contrib.auth.models import User
@@ -132,11 +133,16 @@ class MinimumLengthValidatorTest(SimpleTestCase):
         with self.assertRaises(ValidationError) as cm:
             MinimumLengthValidator().validate("1234567")
         self.assertEqual(cm.exception.messages, [expected_error % 8])
-        self.assertEqual(cm.exception.error_list[0].code, "password_too_short")
+        error = cm.exception.error_list[0]
+        self.assertEqual(error.code, "password_too_short")
+        self.assertEqual(error.params, {"min_length": 8})
 
         with self.assertRaises(ValidationError) as cm:
             MinimumLengthValidator(min_length=3).validate("12")
         self.assertEqual(cm.exception.messages, [expected_error % 3])
+        error = cm.exception.error_list[0]
+        self.assertEqual(error.code, "password_too_short")
+        self.assertEqual(error.params, {"min_length": 3})
 
     def test_help_text(self):
         self.assertEqual(
@@ -144,6 +150,24 @@ class MinimumLengthValidatorTest(SimpleTestCase):
             "Your password must contain at least 8 characters.",
         )
 
+    @mock.patch("django.contrib.auth.password_validation.ngettext")
+    def test_l10n(self, mock_ngettext):
+        with self.subTest("get_error_message"):
+            MinimumLengthValidator().get_error_message()
+            mock_ngettext.assert_called_with(
+                "This password is too short. It must contain at least %d character.",
+                "This password is too short. It must contain at least %d characters.",
+                8,
+            )
+        mock_ngettext.reset()
+        with self.subTest("get_help_text"):
+            MinimumLengthValidator().get_help_text()
+            mock_ngettext.assert_called_with(
+                "Your password must contain at least %(min_length)d " "character.",
+                "Your password must contain at least %(min_length)d " "characters.",
+                8,
+            )
+
     def test_custom_error(self):
         class CustomMinimumLengthValidator(MinimumLengthValidator):
             def get_error_message(self):