next try to fix redirection from /de/sitepage/

.htaccess

@@ -17,7 +17,7 @@ RewriteRule ^(.*) http://mehl.mx/$1 [R=301,L]
 # Rewrite URL/de to URL/index.de.php
 RewriteRule ^(..)/?$ /index.$1.php
 # Rewrite e.g. URL/en/contact to URL/contact.en.php
-RewriteRule ^(..)/(.*)/?$ /$2.$1.php
+RewriteRule ^(..)/([A-Za-z])/?$ /$2.$1.php
 # Rewrite empty URL to standard index page
 RewriteRule ^/?$ index.de.php
 # Rewrite e.g. URL/contact to URL/de/contact and make it visible