However, I think we should encourage people (maybe writting in the bounties forum) to add support for other languages.
I don't think so. The "Bounties" forum is for things we absolutely need, and yet another scripting language is no such thing.
First, the actual need for scripting is over-estimated (we have a working implementation for 4 months now, and nobody uses it).
Second, the Angelscript engine has a lot of advantages over Perl, Python, or whatever other script language we could use (to name just a few of many: security, ease of use, integration, speed, lack of external dependencies).
Basically you call the interpreter (instead of the compiler) with a list of file.
How can that be used, for example, to add files to a project, to insert text into the editor, or to start a build process? I agree that it is really simple to run a script in an external interpreter, but integrating it into the IDE is a wholly different matter.