It seems I don't understand how to set the default language for Django CMS. I want the default language to be set to Dutch. However, for an unknown reason, it always defaults to English when creating or after modifying/editing a Page.
Take the following scenario. I open the Page tree. English is selected by default. I select Dutch. I edit this page. I publish it. I click on edit, it opens the English page which is empty.
Take another scenario. I open the Page tree. I create a new page. By default it opens for the English variant.
Note: All cookies were removed as suggested in the documentation.
Please advise how I can set the default language to Dutch?
The settings:
from django.utils.translation import gettext_lazy as _
LANGUAGE_CODE = "nl"
SITE_ID = 1
USE_I18N = True
MIDDLEWARE = [
    "django.middleware.security.SecurityMiddleware",
    "corsheaders.middleware.CorsMiddleware",
    "django.contrib.sessions.middleware.SessionMiddleware",
    "django.middleware.locale.LocaleMiddleware",
    "django.middleware.common.CommonMiddleware",
    "django.middleware.csrf.CsrfViewMiddleware",
    "django.contrib.auth.middleware.AuthenticationMiddleware",
    "django.contrib.messages.middleware.MessageMiddleware",
    "django.middleware.common.BrokenLinkEmailsMiddleware",
    "django.middleware.clickjacking.XFrameOptionsMiddleware",
    'cms.middleware.user.CurrentUserMiddleware',
    'cms.middleware.page.CurrentPageMiddleware',
    'cms.middleware.toolbar.ToolbarMiddleware',
    'cms.middleware.language.LanguageCookieMiddleware',
]
LANGUAGES = [
    ('nl', 'Dutch'),
    ('en', 'English'),
]
CMS_LANGUAGES = {
    1: [
        {
            'code': 'nl',
            'name': _('Dutch'),
            'fallbacks': ['en', ],
            'public': True,
            'hide_untranslated': True,
            'redirect_on_fallback': False,
        },
        {
            'code': 'en',
            'name': _('English'),
            'public': True,
        },
    ],
    'default': {
        'fallbacks': ['nl', 'en'],
        'redirect_on_fallback': False,
        'public': True,
        'hide_untranslated': True,
    }
}
