.htaccess infinite redirect loop

I would like to redirect my pages in the following ways:

www.example.com/index.php?locale=it -> www.example.com/it

and I would like to access the same page when I type:

www.example.com/it

I wrote an htaccess file but it causes a redirect loop. Here is the file:

<IfModule mod_rewrite.c> 
Options +FollowSymLinks 
RewriteEngine On 
RewriteBase / 


#REWRITE RULES #--------------------- 
RewriteCond %{QUERY_STRING} ^locale=(it|en|fr|de|es)$ 
RewriteRule ^index\.cfm$ %1? [R=302,L] 


RewriteCond %{REQUEST_URI} !^index\.cfm 
RewriteRule ^(it|en|fr|de|es)/?$ index.cfm?locale=$1   
</IfModule>

Could you help me to resolve it? Thanks!!!

PS: server is ColdFusion + Apache 2.4.7