diff --git a/django/core/checks/translation.py b/django/core/checks/translation.py
index ebbd1eabf3..138ed07ff8 100644
--- a/django/core/checks/translation.py
+++ b/django/core/checks/translation.py
@@ -4,17 +4,17 @@ from django.utils.translation.trans_real import language_code_re
 from . import Error, Tags, register
 
 E001 = Error(
-    'You have provided an invalid value for the LANGUAGE_CODE setting: {}.',
+    'You have provided an invalid value for the LANGUAGE_CODE setting: {!r}.',
     id='translation.E001',
 )
 
 E002 = Error(
-    'You have provided an invalid language code in the LANGUAGES setting: {}.',
+    'You have provided an invalid language code in the LANGUAGES setting: {!r}.',
     id='translation.E002',
 )
 
 E003 = Error(
-    'You have provided an invalid language code in the LANGUAGES_BIDI setting: {}.',
+    'You have provided an invalid language code in the LANGUAGES_BIDI setting: {!r}.',
     id='translation.E003',
 )
 
diff --git a/tests/check_framework/test_translation.py b/tests/check_framework/test_translation.py
index cb6e053d77..4cd79d803f 100644
--- a/tests/check_framework/test_translation.py
+++ b/tests/check_framework/test_translation.py
@@ -42,7 +42,7 @@ class TranslationCheckTests(SimpleTestCase):
                 self.assertEqual(check_setting_language_code(None), [])
 
     def test_invalid_language_code(self):
-        msg = 'You have provided an invalid value for the LANGUAGE_CODE setting: %s.'
+        msg = 'You have provided an invalid value for the LANGUAGE_CODE setting: %r.'
         for tag in self.invalid_tags:
             with self.subTest(tag), self.settings(LANGUAGE_CODE=tag):
                 self.assertEqual(check_setting_language_code(None), [
@@ -55,7 +55,7 @@ class TranslationCheckTests(SimpleTestCase):
                 self.assertEqual(check_setting_languages(None), [])
 
     def test_invalid_languages(self):
-        msg = 'You have provided an invalid language code in the LANGUAGES setting: %s.'
+        msg = 'You have provided an invalid language code in the LANGUAGES setting: %r.'
         for tag in self.invalid_tags:
             with self.subTest(tag), self.settings(LANGUAGES=[(tag, tag)]):
                 self.assertEqual(check_setting_languages(None), [
@@ -68,7 +68,7 @@ class TranslationCheckTests(SimpleTestCase):
                 self.assertEqual(check_setting_languages_bidi(None), [])
 
     def test_invalid_languages_bidi(self):
-        msg = 'You have provided an invalid language code in the LANGUAGES_BIDI setting: %s.'
+        msg = 'You have provided an invalid language code in the LANGUAGES_BIDI setting: %r.'
         for tag in self.invalid_tags:
             with self.subTest(tag), self.settings(LANGUAGES_BIDI=[tag]):
                 self.assertEqual(check_setting_languages_bidi(None), [