A similar language might be Haxe, which can target C++, Java, C#, PHP, JavaScript, Python, Lua, and Neko languages, and make use of the tooling/build chain for those languages.

So you can abstract the syntax from the runtime, but the semantics are often different per target - e.g. accessing the filesystem in Node.js will be different to C++, due to the non-blocking I/O mechanism.

As an aside, the Haxe compiler is written in OCaml. I think there'd be a delicious juxtaposition if it was re-written in Reason. Writing Reason to generate OCaml to create Haxe to generate Java to generate bytecode...