Spanish translation missing for some error messages in Django 5.2.7

[Carlos Sánchez López]

Expected behavior

Email validation error should display in Spanish: "Introduzca una dirección de correo electrónico válida."

Actual behavior

Error displays in English: "Enter a valid email address."

Note: All other Django admin messages (form errors, labels, etc.) correctly display in Spanish.
Only this specific email validation message appears in English.

Configuration

• Django Version: 5.2.7
• Python Version: 3.13
• settings.py:

  ...
  MIDDLEWARE = [
     ...
      'django.contrib.sessions.middleware.SessionMiddleware',
      'django.middleware.locale.LocaleMiddleware',
      'django.middleware.common.CommonMiddleware',
      ...
  ]
  ...
  LANGUAGE_CODE = 'es'
  USE_I18N = True
  LANGUAGES = [('es', 'Spanish')]
  ...
  

Investigation

Confirmed the English string is still used in Django's validator:

$ grep -i "email" env/lib/python3.13/site-packages/django/core/validators.py | grep -i "message"
    message = _("Enter a valid email address.")

Checked Spanish locale file - translation exists but is marked as obsolete (#~):

$ grep -i "correo" env/lib/python3.13/site-packages/django/conf/locale/es/LC_MESSAGES/django.po
#~ msgstr "Introduzca una dirección de correo electrónico válida."
#~ msgstr "Correo electrónico"
#~ msgstr "Introduzca una dirección de correo electrónico válida."
#~ msgstr "Correo electrónico"

Confirmed no active (non-obsolete) translation exists:

$ grep -i "valid.*email" env/lib/python3.13/site-packages/django/conf/locale/es/LC_MESSAGES/django.po | grep -v "^#"
# no results returned

Verified the compiled .mo file doesn't contain the translation:

$ msgunfmt env/lib/python3.13/site-packages/django/conf/locale/es/LC_MESSAGES/django.mo | grep -i "email"
# no results returned

[Carlos Sánchez López]

Screenshot of the email validation error at the bottom. Notice everything else from the admin site is correctly showing up in Spanish.

[Natalia Bidart]

Hola Carlos, thank you for your ticket. I have double checked using a clean Django 5.2.7 project, and also using Django from the main branch. In both cases, the error string is shown as translated. See the screenshot attached.

I'll close as worksforme, this seems to be an issue with your environment. Before reopening, please make sure that you can provide reproducible steps. You can also seek further help using any of the user support channels from ​this link.