Scripting .onion sites

What web `development' language do you recommend for doing work behind a hidden service? PHP, perl, python, whatever other garbage scripting language you have. Once you know one of them you basically know the other anyway. My only requirement is that it can be silent and secure about it's identity.

I want to make a FLOSS project that is going to infringe on some patents.... I mean, a CP site.

Might as well run Ruby. It's not as if it's going to be able to get much slower.