French translation raises “ValueError('invalid token in plural form: %s' % value)”

问题

I want to handle a french version of my website.

I use Django 2.2 with i18n and I already set locale variables in settings.py.

# Internationalization
# https://docs.djangoproject.com/en/2.2/topics/i18n/

LANGUAGES = (
    ('en', _('English')),
    ('fr', _('French')),
    ('it', _('Italian')),
    ('es', _('Spanish')),
)

LOCALE_PATHS = (
    os.path.join(BASE_DIR, 'locale'),
)

TIME_ZONE = 'Europe/Paris'

USE_I18N = True

USE_L10N = True

USE_TZ = True

When I use ./manage.py makemessages -l fr, I correctly have a django.po french file but after ./manage.py compilemessages -l fr the server crashes with the following error (trimed) :

  File "/usr/lib/python3.7/gettext.py", line 93, in _tokenize
    raise ValueError('invalid token in plural form: %s' % value)
ValueError: invalid token in plural form: EXPRESSION

English, Italian and Spanish translations work well

EDIT : Well, the issue has been resolved, but I'm not really sure how. I deleted my venv, recreated it and french translation suddenly worked. Upgrading from Django 2.2.1 to 2.2.2 may be what caused the resolution.

来源：https://stackoverflow.com/questions/56545202/french-translation-raises-valueerrorinvalid-token-in-plural-form-s-value