How to translate between programming languages

I am setting out to do a side project that has the goal of translating code from one programming language to another. The languages I am starting with are PHP and Python (Python to PHP should be easier to start with), but ideally I would be able to add other languages with (relative) ease. The plan is:

Compiling an AST back to source code

I'm currently in the process of building a PHP Parser written in PHP, as no existing parser came up in my previous question . The parser itself works fairly well.

CoffeeScript-like language written in Python

Are there any languages targeting JavaScript (like CoffeeScript) and written in Python? I found Pyjamas , but it’s GWT of Python as I see. I want a language that doesn’t need heavy runtime library and is able to be compiled to JavaScript. I found Mascara also, and it very satisfies my requirements except it’s license. CoffeeScript is ideal for me except it’s written in CoffeeScript itself. I have to compile [CoffeeScript-like language] source codes into JavaScript statically in Python application.

ECMAScript:Harmony / ES6 to JavaScript compiler

After reading Peter's article on JavaScript I noticed

Brendan Eich stated that one the goals for Harmony is to be a better target for to-JavaScript compilers.

What causes java.lang.IncompatibleClassChangeError?

I'm packaging a Java library as a JAR, and it's throwing many java.lang.IncompatibleClassChangeError s when I try to invoke methods from it. These errors seem to appear at random. What kinds of problems could be causing this error?

Why doesn"t Sun do a C# to Java byte code compiler?

We Want to Run Our C# Code on the JVM

Can Emscripten compile LLVM to JavaScript?

I'd like to know if Emscripten is self-hosting in such a way, that it can compile LLVM to JavaScript?