How To Change Wagtail's Default Language?

I'm using headless Wagtail and want to change the default backend language to Portuguese (pt-pt). Following wagtail's docs: # settings.py USE_I18N = True LANGUAGE_CODE = 'pt-pt'

Solution 1:

You're following documentation from Wagtail 2.0, which is very outdated. The documentation for Wagtail 2.11's internationalisation support (unreleased at the time of writing) can be found here: https://docs.wagtail.io/en/latest/advanced_topics/i18n.html

As mentioned there, when you configure languages in your settings file you also need to set up Locale records in the database. This can be done in a data migration, or by enabling the wagtail.locales app and going through the Settings -> Locales area in the admin:

INSTALLED_APPS = [
    # ...'wagtail.locales',
    # ...
]