drupal nginx and browser language detection

site.conf

map $http_accept_language $lang {
        default de;
        ~*fr fr;
        ~*it it;
}

server {
        server_name _ site.com;
        root /var/www/site.com/drupal;
        client_max_body_size 10m;
        location = /favicon.ico {
                log_not_found off;
                access_log off;
        }

        location = /robots.txt {
                allow all;
                log_not_found off;
                access_log off;
        }

        # This matters if you use drush
        location = /backup {
                deny all;
        }

        # Very rarely should these ever be accessed outside of your lan
        #location ~* \.(txt|log)$ {
        #        allow 193.168.0.0/16;
        #        deny all;
        #}

        location ~ \..*/.*\.php$ {
                return 403;
        }

        location / {
                # This is cool because no php is touched for static content
                try_files $uri @rewrite;
        }


        location @rewrite {
                # Some modules enforce no slash (/) at the end of the URL
                # Else this rewrite block wouldn't be needed (GlobalRedirect)
                rewrite ^/(.*)$ /index.php?q=$1;
        }
        location ~ \.php$ {
                if ($args = '') {
                        rewrite ^/index.php$ /$lang redirect;
                }
                if ($args = 'q='){
                        rewrite ^/index.php$ /$lang? redirect;
                }
                fastcgi_split_path_info ^(.+\.php)(/.+)$;
                #NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini
                include fastcgi_params;
                fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                fastcgi_intercept_errors on;
                fastcgi_pass 127.0.0.1:9000;
        }

        # Fighting with ImageCache? This little gem is amazing.
        location ~ ^/sites/.*/files/imagecache/ {
                try_files $uri @rewrite;
        }
        # Catch image styles for D7 too.
        location ~ ^/sites/.*/files/styles/ {
                try_files $uri @rewrite;
        }

        location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ {
                expires max;
                log_not_found off;
        }
}

Add * to language matching