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i18n & L10n localization internationalization
- 1. i18n & L10n Thierry Sans
- 2. Internationalization (i18n) ” Internationalization is the process of designing a software application so that it can be adapted to various languages and regions without engineering changes. “ Wikipedia ➡ Make an application language agnostic
- 3. Localization (L10n) ” Localization is the process of adapting internationalized software for a specific region or language by adding locale- specific components and translating text. “ Wikipedia ➡ Adapting an application for a specific language (aka locale)
- 4. It is is not only about language translation • Number format • Date/Time • Sort orders • Units and conversion • Currency • Paper size
- 5. How does it work
- 6. Configure your locale preference
- 12. What are the difference locales? http://www.i18nguy.com/unicode/language-identifiers.html
- 13. Step 1 - Configure Django
- 14. settings.py # Language code for this installation. All choices can be found here: # http://www.i18nguy.com/unicode/language-identifiers.html LANGUAGE_CODE = 'en-us' # If you set this to False, Django will make some optimizations so as # not to load the internationalization machinery. USE_I18N = True # If you set this to False, Django will not format dates, numbers and # calendars according to the current locale USE_L10N = True
- 15. Detects your locale from the HTTP request settings.py MIDDLEWARE_CLASSES = ( 'django.middleware.locale.LocaleMiddleware', 'django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', )
- 16. settings.py INSTALLED_APPS = ( 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.sites', 'django.contrib.messages', 'django.contrib.staticfiles', 'WebDirectory', 'HelloLocale', # Uncomment the next line to enable the admin: 'django.contrib.admin', # Uncomment the next line to enable admin documentation: # 'django.contrib.admindocs', )
- 17. Step 2 - Marking
- 18. Mark translation messages from a template HelloLocale/templates/HelloLocale/index.html {% load i18n %} <html> <head> <title>{% trans "Hello World!" %}</title> ... </head> <body> <form action='sayhello/' method='post'> {% csrf_token %} <label>{% trans "Your name" %}</label> <input type="text" name="name"/> </form> <input type="button" value="{% trans "send" %}" onclick=" ... <body> </html>
- 19. Mark translation messages from views.py HelloLocale/views.py from django.utils.translation import ugettext as _ def sayHello(request): name = request.POST['name'] output = _('Hello %(name)s!') % {'name' : name} return HttpResponse(strip_tags(output))
- 20. Step 3 - Creating a locale
- 21. Create a locale • Create a locale directory in the app • $ cd HelloLocale The locale identifier $ mkdir Locale $ django-admin.py makemessages -l fr ➡ Generates a .po file
- 22. Define the translations HelloLocale/locale/fr/LC_MESSAGES/Django.po #: views.py:20 #, python-format msgid "Hello %(name)s!" msgstr "Bonjour %(name)s!" #: templates/HelloLocale/index.html:4 msgid "Hello World!" msgstr "Bonjour tout le monde!" #: templates/HelloLocale/index.html:11 msgid "Your name" msgstr "Votre nom" #: templates/HelloLocale/index.html:13 msgid "send" msgstr "envoyer"
- 23. Compile locales $ django-admin.py compilemessages ➡ Creates a .mo file
- 24. Update locales $ django-admin.py makemessages -a $ django-admin.py compilemessages
- 25. Custom locale
- 26. Custom locale from django.utils.translation import ugettext as _ def sayHello(request): language = 'en-us' translation.activate(language) request.LANGUAGE_CODE = translation.get_language() name = request.POST['name'] output = _('Hello %(name)s!') % {'name' : name} return HttpResponse(strip_tags(output))
- 27. Idea • The language preference is stored in the user’s profile • When the user is authenticated, store the language in a cookie or a session
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