The Symfony website has always been in English as English is probably the lingua-franca for web developers. But as some sections of the website do not change that frequently (mainly the "What is Symfony?", "Get started", and "About" sections), and because not all developers are comfortable reading English websites, I'm very happy to announce that most of the static contents are now available in a public Git repository.
You are free to make changes to the current English text, or start translating the content into your language. We quietly created the repository yesterday afternoon, and more than 10 people already submitted 20 pull requests. That's just amazing. To avoid duplicate work, be sure to announce your work by creating an almost empty pull request (with a [WIP] prefix, so that others can contact you easily and help you).
The content is available under the same license as the Symfony documentation: the Creative Commons Attribution-Share Alike 3.0 Unported License.
This is just the first step and all the menus should also be available for translation soon.