LANGUAGE_SESSION_KEY is a constant within the django.utils.translation module of the Django project.
django-cms (project website) is a Python-based content management system (CMS) library for use with Django web apps that is open sourced under the BSD 3-Clause "New" license.
django-cms / cms / middleware / language.py
# language.py
import datetime
from django.utils.translation import LANGUAGE_SESSION_KEY, get_language
from django.conf import settings
from cms.utils.compat import DJANGO_2_2
from cms.utils.compat.dj import MiddlewareMixin
class LanguageCookieMiddleware(MiddlewareMixin):
def process_response(self, request, response):
language = get_language()
if hasattr(request, 'session') and DJANGO_2_2:
session_language = request.session.get(LANGUAGE_SESSION_KEY, None)
if session_language and not session_language == language:
request.session[LANGUAGE_SESSION_KEY] = language
request.session.save()
if settings.LANGUAGE_COOKIE_NAME in request.COOKIES and \
request.COOKIES[settings.LANGUAGE_COOKIE_NAME] == language:
return response
max_age = 365 * 24 * 60 * 60 # 10 years
expires = datetime.datetime.utcnow() + datetime.timedelta(seconds=max_age)
response.set_cookie(settings.LANGUAGE_COOKIE_NAME, language, expires=expires)
return response
## ... source file continues with no further LANGUAGE_SESSION_KEY examples...