translation of rules buggy?

[nerdoc]

I have a simple object:

class RecurringTask(CreatedUpdatedMixin):
    title = models.CharField(max_length=255)
    recurrence = RecurrenceField()

    def __str__(self):
        return (
            f"{self.title} ({', '.join([r.to_text() for r in self.recurrence.rrules])})"
        )

When I see it in the Django admin, it translates the rule correctly into German (alle 3 Monate):

But when I click on the item, the field is untranslated ("every 3 months"):

Could it be that the RecurrenceField uses an untranslated string output when creating the edit widget?
Or are these strings translated separatedly, and one is just not translated?

[lino]

Did you follow the instructions how to set up i18n?

https://django-recurrence.readthedocs.io/en/latest/installation.html#set-up-internationalization

[nerdoc]

Yes, this is my main urls.py:

import django
from django.urls import path
from main.views import MainView
from django.views.i18n import JavaScriptCatalog

urlpatterns = [...]

js_info_dict = {
    'packages': ('recurrence', ),
}

urlpatterns += [
    path('jsi18n', JavaScriptCatalog.as_view(), js_info_dict),
]