How do I get makemessages to ignore already-translated strings?

In Django 5, I am running

 ./manage.py makemessages -l fr

I have also copied templates/registration/registration_form.html from the “registration” app (django-registration-redux), so that I can modify it to extend the base.html from my project.

Now, every translated string in my copy of registration_form.html is making its way into my locale/fr/LC_MESSAGES/django.po file for translation.

However, those strings are already translated in the app directory. The docs says:

[Django] looks for and uses if it exists a locale directory in each of the installed apps listed in INSTALLED_APPS

That is a correct and fine behavior. The translations are fine.

So, I don’t want all those strings in my file, looking like they need to be translated again.

I tried each of the following:

./manage.py makemessages -l fr -i registration/locale
./manage.py makemessages -l fr -i .venv/lib/python3.11/site-packages/registration/locale/

to no effect.