how can I fix this? I'm testing it on my local pc using xampp and it's causing the server to time out (firefox says "The page isn't redirecting properly...Firefox has detected that the server is redirecting the request for this address in a way that will never complete.":
Options +FollowSymLinks
RewriteEngine On
RewriteBase /testurl1/
RewriteRule ^(.*en.*)$ $1?language=en [L,R]