I've eventually given up trying representing hubjects at all, at least for the moment. I had a serious try at it at lingvoj.org. But after discussions in the Linking Open Data forum, I eventually surrendered and published the languages description in a way conformant to W3C recommandations for Semantic Web architecture, with content negociation, 303 redirects and the like. I've even suppressed the previous post here saying otherwise, which would be now full of dead links and would bring about confusion.
So we'll see how this flies. Feed your favourite tool with the URI http://www.lingvoj.org/lang/zh, and figure by yourself if it provides a useful description of the Chinese language, both for humans and machines.