for i in `find * -depth`; do (mv -fi $i `echo $i | sed 's%[^/][^/]*$%%'``echo $i | sed 's!.*/!!' | tr [:upper:] [:lower:]`); done
It will work recursively, and it will rename everything to lowercase.
So anything you have that you don't want to be translated, be sure its not anywhere within the directory tree that you run this from.