depends at the level you want to work. UI/Web and hard to avoid JavaScript/HTML5 although Elm is very interesting.

Move lower down the stack and things like C/C# are popular. I am a huge fan of C# over C although C++ still has huge traction.

Python is a great language but things like F# and Haskell are gaining ground. Facebook has one of the biggest Haskell stacks out there although they still run a lot of PHP (oompf I have just thrown up in my mouth) lol

All boils down to where you like to work and the languages you like :)