What’s the correct way to set up Django translation?

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Add LOCALE_PATHS to settings.py and set it as below:

import os
BASE_DIR = os.path.dirname(os.path.dirname(__file__))

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

Note that LOCALE_PATHS must be a tuple (look at the comma at the end of the path).

Now based on LOCALE_PATHS, the locale folder should be in the root of your project.

And be sure that you run the commands django-admin.py makemessages -l de and django-admin.py compilemessages from the root of your project.

djPrj
  |
  +---> djPrj
  |
  +---> djApp
  |
  +---> locale
  |
  +---> templates

Also rearrange your MIDDLEWARE_CLASSES to be LocaleMiddleware after SessionMiddleware and before CommonMiddleware as mentioned here:

MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.locale.LocaleMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
)

Restart your service (python manage.py runserver) and check again.

Just to ensure that your localization is applied to your Django admin page with the default django.mo file of Django, do the following test:

First in main urls.py of project replace patterns with i18n_patterns:

from django.conf.urls.i18n import i18n_patterns

urlpatterns = i18n_patterns('',
    url(r'^admin/', include(admin.site.urls)),
    # ...
)

Now go to the admin page with a de prefix, like: http://127.0.0.1:8000/de/admin/
And the admin page should be shown in German.

OK, are you able to see the admin page of Django in German?

Also check your view with the de prefix too.

According to your project code, some sentences are not in trans blocks. Put them as:

{% trans "your sentence" %}

Also you must use ugettext_lazy instead of ugettext in your code for views and models (Read here and here.)

Replace this:

from django.utils.translation import ugettext as _

with: 

from django.utils.translation import ugettext_lazy as _

And now everything will work.

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