What program language get me the most money?

I know a few language and want to specialize in at least 1.

and only talking about salary, not just projects etc.

It's more about skill than language, so whatever language you like that will encourage you to push yourself to the limit and soak up as much knowledge as you can. senior engineers at amagoogbooksoft make 200k+, distinguished engineers make 1mill plus.

most programmers are intellectually lazy, and do not learn anything outside of school, so picking something up like obj-c or ruby that isn't usually taught in normal curriculum can give you bargaining power over the unwashed masses.

but to be honest, this is the wrong way to think. Our industry rewards skill and focus above all else.