Internationalization, or running a website in multiple languages, is a complicated problem with several parts:
- The application itself. Your toolbar, the editing window - all the interface you use to run concrete5 can be translated into different languages. If you've got administrators who don't speak english, you may want to run concrete5 in a different language. You can find language packs from the developers internationalization area. Once you have them installed, you can choose which language is default from this interface.
- The content of your website. If you want to run a website with content in multiple langauges, you need the free Internationalization add-on. If you have a group of translators involved and you want to have some process management tools, you may want the Enterprise Internationalization add-on.