What language do you speak? Programming I mean

I have a question for all you programmers out there.

I am not a programmer however I have been dabbling in some programming projects in my current role. Just some simple but useful stuff. I have done some VB, VBScript, ASP and some PHP projects.

I wonder, all the developers out there, do you focus on one language and do everything in that language or do you know many different languages? I would like very much to develope this skill set and possibly even make a shift in career path. Nothing is more enjoyable to me than developing an application and actually seeing it work.