Possibly including other programming launguages

Hi,

I've been using Khan academy for several years, and it has really helped me learn throughout my schooling.

But I recently took up computer programming and I see a lack of variety of programming languages available on the site. I am eventually looking to go into the programming field for gaming, and I was wondering if anyone knew what language would be best to start learning for that field. I have a background in the basics of C#, but that is majorly it. From what I have seen it looks like C++ is the dominant programming language for gaming, but I am unsure. 

In anyone could provide me with advice or input that would be much appreciated!

Thank You