Mit einer Regel in der .htaccess (Apache-Server)
Z.B. so etwas (muss natürlich angepasst werden):
RewriteEngine On
RewriteCond %{HTTP:Accept-Language} ^en [NC]
RewriteRule ^$ http://mysite.com/en/ [L,R=301]
RewriteCond %{HTTP:Accept-Language} ^de [NC]
RewriteRule ^$ http://mysite.com/de/ [L,R=301]
RewriteCond %{HTTP:Accept-Language} ^nl [NC]
RewriteRule ^$ http://mysite.com/nl/ [L,R=301]
RewriteCond %{HTTP:Accept-Language} ^fr [NC]
RewriteRule ^$ http://mysite.com/fr/ [L,R=301]
RewriteCond %{HTTP:Accept-Language} ^es [NC]
RewriteRule ^$ http://mysite.com/es/ [L,R=301]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule ^(en|de|nl|fr|es)/?$ index.php?lang=$1 [QSA,NC,L]
RewriteEngine On
RewriteCond %{HTTP:Accept-Language} ^en [NC]
RewriteRule ^$ http://mysite.com/en/ [L,R=301]
RewriteCond %{HTTP:Accept-Language} ^de [NC]
RewriteRule ^$ http://mysite.com/de/ [L,R=301]
RewriteCond %{HTTP:Accept-Language} ^nl [NC]
RewriteRule ^$ http://mysite.com/nl/ [L,R=301]
RewriteCond %{HTTP:Accept-Language} ^fr [NC]
RewriteRule ^$ http://mysite.com/fr/ [L,R=301]
RewriteCond %{HTTP:Accept-Language} ^es [NC]
RewriteRule ^$ http://mysite.com/es/ [L,R=301]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule ^(en|de|nl|fr|es)/?$ index.php?lang=$1 [QSA,NC,L]