GAE I18n

commands.sh

# Creating dir for translation files
mkdir -p /path/to/myapp/conf/locale

cd /path/to/myapp

# Creating language file by scanning app directory for text marked for translation.
# It will appear in /path/to/conf/locale/en/LC_MESSAGES/django.po
# Run command for each needed language
PYTHONPATH=/path/to/googleappengine/lib/django/ 
/path/to/googleappengine/lib/django/django/bin/make-messages.py -l en


# Compile messages to django.mo files after finishing translation
# Usually local app engine server need restart to changes take place
PYTHONPATH=/path/to/python/googleappengine/lib/django/ 
/path/to/googleappengine/python/lib/django/django/bin/compile-messages.py

# Command to update message
# It will update django.po files. Translate them and compile again.
PYTHONPATH=/path/to/googleappengine/python/lib/django/ 
/path/to/googleappengine/python/lib/django/django/bin/make-messages.py -a

index.py

# -*- coding: utf-8 -*-

import Cookie
import re
import os

from google.appengine.ext import webapp
from google.appengine.ext.webapp import template
from google.appengine.api import users

os.environ['DJANGO_SETTINGS_MODULE'] = 'conf.settings'
from django.conf import settings
# Force Django to reload settings
settings._target = None
from django.utils import translation


class IndexPage(webapp.RequestHandler):

  def reset_language(self):
    supported = dict(settings.LANGUAGES)
    language = language = self.request.cookies.get('django_language')
    if language and language in supported:
        pass
    else:
      language = settings.LANGUAGE_CODE
      
    translation.activate(language)
    self.request.LANGUAGE_CODE = translation.get_language()
    self.response.headers['Content-Language'] = translation.get_language()
    return language

  
  def get(self, param=None):
    if param in ['en', 'ru']:
      cookie  = Cookie.SimpleCookie() 
      cookie['django_language'] = param
      cookie['django_language']['expires'] = 365*24*60*60 
      h = re.compile('^Set-Cookie: ').sub('', cookie.output(), count=1)
      self.response.headers.add_header('Set-Cookie', str(h))
      self.reset_language()
      self.redirect('/')
    curLang = self.reset_language()
    path = os.path.join(os.path.dirname(__file__), '../../templates/index.html')
    self.response.out.write(template.render(path, {
                                                  "curLang": curLang,
                                                  "langs": settings.LANGUAGES,
                                                  }))

settings.py

# conf/settings.py

USE_I18N = True

# Valid languages
LANGUAGES = (
    ('ru', 'RUS'),
    ('en', 'ENG'),
    )

# This is a default language
LANGUAGE_CODE = 'ru'