Seems that this initial release only supports python. The client is obviously heavy, since it has to run all the queries, etc. Thankfully the protocol is well defined, so it's just a question of effort to support more languages.
Protocol and some clean reference implementation without dependencies will be neat.
Reference implementation without dependencies would be just a more cross-language rewrite of these dependencies though, so would take quite a while. Good news is that authors of ZODB which we use as a dependency are willing to do that (and already do that) in a more cross-language way.