Internationalization

• Internationalization (often abbreviated "i18n" because of the number of letters) is the preparation of software for multilingual support
• Localization (often abbreviated "l10n") is the process of making internationalized software accessible to people using various languages and symbologies
• A lot of software is built on top of gettext
• We will build our own to show how it works
• test_translation.py:
  • Register a function with Jinja2 so that we can call it inside our template
  • Define a translation table
  • Use an object that creates a translation function that captures the language
  • Call the translation function _() to save typing
• util.py loads a translation table based on (yet another) environment variable
• views.py uses the request's accept_languages property to look up the user's desired language code
• server.py passes request.accept_languages to view functions
• request_lang.py gets a resource with an explicit Accept-Language header
  • Can/should use unit tests from Testing the Server and Testing in the Browser