#36636: Outdated documentation in set_language() references removed 
session-based
language storage
-------------------------------------+-------------------------------------
     Reporter:  Samriddha Kumar      |                     Type:  Bug
  Tripathi                           |                Component:
       Status:  new                  |  Documentation
      Version:  5.2                  |                 Severity:  Normal
     Keywords:                       |             Triage Stage:
                                     |  Unreviewed
    Has patch:  0                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  0
Easy pickings:  1                    |                    UI/UX:  0
-------------------------------------+-------------------------------------
 The documentation and docstring for `django.views.i18n.set_language()`
 contain outdated information about session-based language storage, which
 was deprecated in Django 3.0 and removed in Django 4.0.

 **Affected locations:**

 1. **Docstring in `django/views/i18n.py`:**
    Current text says: "Redirect to a given URL while setting the chosen
 language **in the session** (if enabled) and in a cookie."

 2. **Documentation (i18n section):**
    Current text says: "The view expects to be called via the POST method,
 with a language parameter set in request. **If session support is enabled,
 the view saves the language choice in the user's session.** It also saves
 the language choice in a cookie that is named django_language by default."

 **The issue:**

 The actual code in `set_language()` does NOT save the language to the
 session. According to the Django 3.0 release notes:

 > "To limit creation of sessions and hence favor some caching strategies,
 django.views.i18n.set_language() will stop setting the user's language in
 the session in Django 4.0. Since Django 2.1, the language is always stored
 in the LANGUAGE_COOKIE_NAME cookie."

 **Expected behavior:**

 Both the docstring and documentation should be updated to remove
 references to session storage and clarify that the language choice is
 stored only in the cookie (LANGUAGE_COOKIE_NAME, which defaults to
 django_language).

 **Credit:** Issue reported by kid_alan_ on Discord.
-- 
Ticket URL: <https://code.djangoproject.com/ticket/36636>
Django <https://code.djangoproject.com/>
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