the simple way will be to use .htaccess

    <IfModule mod_rewrite.c>
      RewriteEngine On
      RewriteCond %{HTTP_HOST} ^litebook.de$ [OR]
      RewriteCond %{HTTP_HOST} ^www.litebook.de$
      RewriteRule (.*)$ http://litebook.de/de/$1 [R=301,L]
      RewriteCond %{HTTP_HOST} ^litebook.co.uk$ [OR]
      RewriteCond %{HTTP_HOST} ^www.litebook.co.uk$
      RewriteRule (.*)$ http://litebook.eu/en/$1 [R=301,L]
    </IfModule>