PHPMaster.com: Internationalization Made Easy
If you've ever worked to develop a site which needed to be available in multiple languages then you know how difficult it can be. With the help of Symfony2′s Translation component you can easily make internationalized sites. I'll show you how with some sample code and some discussion on its API.
He includes a basic example of how the component works with the typical "hello world" translation from English to French. He mentions fallback locales, pluralization and the conversion between translation formats (like converting from a YAML file into a translation object).