Hello,
the last version 1.6, in « preview release » is multilingual.
You can download it here :
http://rezo.net/spip-dev/devel/
and eventually the very last one here from the cvs :
http://rezo.net/spip-cvs/cvs_root.tar.gz?tarball=1&cvsroot=SPIP
you will be asked a login and password: both ‹ cvs ›
regards,
daniel