I have already modified my htaccess with
RewriteCond %{HTTP:X-GT-Lang} ^$
RewriteCond %{HTTP_HOST} ^italyonmotorbike.com
RewriteRule (.*)
http://www.italyonmotorbike.com/$1 [R=301,L]
but when I choose an other language it redirect always to
www.italyonmotorbike.comThanks