#28070: set_language (i18n) without next does not change language if called 
from a
language prefixed URL
-------------------------------------+-------------------------------------
               Reporter:  Monsieur   |          Owner:  nobody
  Cellophane                         |
                   Type:  Bug        |         Status:  new
              Component:             |        Version:  1.11
  Internationalization               |       Keywords:  set_language, url
               Severity:  Normal     |  translation
           Triage Stage:             |      Has patch:  0
  Unreviewed                         |
    Needs documentation:  0          |    Needs tests:  0
Patch needs improvement:  0          |  Easy pickings:  0
                  UI/UX:  0          |
-------------------------------------+-------------------------------------
 Greetings.

 **Preamble**:
 Switching language by posting to set_language with an empty next parameter
 causes a redirection to the REFERER url, as per the documentation.

 **Description**:

 What this means is that if language selection is made from a language-
 neutral URL (say /about/), selecting english as language the redirection
 in set_language will land the user to /en/about.

 If - however - a new language selection (say de) is now made from
 /en/about/, the landing spot will be (again) /en/about, rather than the
 expected /de/about; the new language is now, however, memorised in the
 user's session.

 **What should happen:**
 Invoking set_language from a language prefixed page with an empty next
 parameter should redirect to the language-neutral URL, allowing the
 session based url selection to kick in.

 **What would help:**

 Of course, being able to reference the current language-neutral url as the
 next parameter to set_language would achieve the result. However,
 language-neutral urls aren't availble in templates (or anywhere I looked);
 so one's best hope is writing a custom template filter that strips the
 language prefix from a URL and hen use the stripped request.path o
 request.get_fulL_path as the next parameter to the POST.

--
Ticket URL: <https://code.djangoproject.com/ticket/28070>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.

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