Switch language in Django with the translated url redirect

Question

I have internationalization correctly installed.

It\'s works with urls like:

/en/bookings/ #English
/es/reservas/ #Spanish

In the h

Answer 1

I had similar problem so I sending my resolution to save Your time.

main(urls.py)

from django.conf.urls import include, url
from django.conf.urls.i18n import i18n_patterns

urlpatterns = [
    url(r'^i18n/', include('django.conf.urls.i18n')), 
]

urlpatterns += i18n_patterns(
    url(r'^', include('index.urls', namespace='index')),
)

(index.urls.py)

from django.conf.urls import url
from django.views.generic import TemplateView
from django.utils.translation import ugettext_lazy as _


urlpatterns = [
    url(r'^$', TemplateView.as_view(template_name='index/index.html'), name='index'),
    url(_(r'^python-programming/$'), TemplateView.as_view(template_name='index/new_page.html'),
        name='new_page'),
]

Creating template tag to return urls for current location in all languages that we support (index.templatetags.helper_tags.py)

from django.template import Library
from django.core.urlresolvers import resolve, reverse
from django.utils.translation import activate, get_language

register = Library()


@register.simple_tag(takes_context=True)
def change_lang(context, lang=None, *args, **kwargs):
    """
    Get active page's url by a specified language
    Usage: {% change_lang 'en' %}
    """

    path = context['request'].path
    url_parts = resolve(path)

    url = path
    cur_language = get_language()
    try:
        activate(lang)
        url = reverse(url_parts.view_name, kwargs=url_parts.kwargs)
    finally:
        activate(cur_language)

    return "%s" % url

Creating middleware to change site language when user will click at alternative link to this sub site but in different language (middleware.py)

from django.utils import translation
from django.conf import settings
from django.utils.deprecation import MiddlewareMixin


class LangBasedOnUrlMiddleware(MiddlewareMixin):

    @staticmethod
    def process_request(request):

        if hasattr(request, 'session'):
            active_session_lang = request.session.get(translation.LANGUAGE_SESSION_KEY)

            if active_session_lang == request.LANGUAGE_CODE:
                return

            if any(request.LANGUAGE_CODE in language for language in settings.LANGUAGES):
                translation.activate(request.LANGUAGE_CODE)
                request.session[translation.LANGUAGE_SESSION_KEY] = request.LANGUAGE_CODE

Adding it to (settings.py) just after LocaleMiddleware

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.locale.LocaleMiddleware',
    'our_app.middleware.LangBasedOnUrlMiddleware',
]

Sample usage in template:

{% load i18n %}
{% load helper_tags %}
    {% get_available_languages as languages %}
    {% for lang_code, lang_name in languages %}
        
    {% endfor %}