You have to active the jdlanguage module in the Extensions->Module Manage. On the image you could see two options for this module: "Show current language" and "Add alternate meta Tags", the first options decides if the current language get shown as on jdiction.org. The second options adds a meta tag for each Site it could find a translation, you could find more information about this tag at w3.org. So now your are finished with the basics.

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