ChinesePatch is a ZopeDefault Splitter replacement for Chinese (maybe other asian languages). It support unicode(UTF-8) and GB2312 and BIG5(three byte and two byte) encoding.
It ALSO patched Structured-Text, so ZWiki and other products using structured-text will be working nice with Chinese encoding.
This product is work fine with utf-8 and gb2312, other encoding is not widely tested.