Puoi usare javascript
codice:
<script language="JavaScript" type="text/javascript">
<!-- 
if (navigator.appName == 'Netscape') 
    var language = navigator.language; 
else 
    var language = navigator.browserLanguage; 

var code = language.substring(0,2); 

if ((code == 'fr') || (code == 'de') || (code == 'it') || (code == 'sp')) 
{ 
if (code == 'fr') url ="index_FR.htm"; 
if (code == 'de') url ="index_DE.htm"; 
if (code == 'sp') url ="index_SP.htm"; 
if (code == 'it') url ="index_IT.htm"; 
}    
else {url ="index_UK.htm";} 
 
document.location.href = url 
alert(url); 
// end --> 
</script>
oppure con .htacces qui puoi scegliere il tutorials
https://www.google.it/search?q=reind...ngua+.htaccess