Information on using WannaBe in Japanese is available at <http://www7.plala.or.jp/rockstone/wannabe.html>.
The following links all appear rotten as of 2005 July 4:
Jan Muennich has German localizations of WannaBe at <http://www.jan-muennich.de/wannabe.html>.
Jean-Pierre Kuypers has French localizations of WannaBe available via FTP at <ftp://ftp.sri.ucl.ac.be/pub/WWW/WannaBe/>.
Please send me any links you have to other localized versions or patches for WannaBe.