In the previous tidbits we covered each language and translation capability one by one. The community translates the software interface on http://localize.drupal.org/ which you can customize with Interface translation. You can translate your local configuration and content with the Configuration translation and Content translation modules respectively. However, actual real life use cases are never clear cut like that. Content shows up with some shipped interface elements, local configuration and content. Menus contain elements from code, content and configuration. It is good to know how these pieces relate so you can translate every piece and know the right place to do it.