models.py

# this file is in a package named verboten
from django.utils.translation import ugettext_lazy as _
from django.http import HttpResponseForbidden
from django.template import RequestContext, loader

from django.db import models
from django.conf import settings

class LanguagePermissions(models.Model):
    """Only used to define permissions"""
        
    class Meta:
        permissions = settings.LANGUAGES


class VerbotenMiddleWare(object):
    """If you don't have permissions, you can not enter!"""
    def process_request(self, request):
        language = request.LANGUAGE_CODE
        
        if request.user.is_authenticated():
            if not request.user.has_perm("verboten.%s" % language):

                t = loader.get_template("admin/403.html")
                request.user.message_set.create(message=_("You don't have permission to edit %s") % language)
                return HttpResponseForbidden(t.render(RequestContext(request)))

        return None