Which language is usefull to program video games ?

Answer 1

JavaScript or C# for Unity development, C++ or Lua for a from-scratch development, or GML (Game Maker Language) for using GameMaker Studio for 2D game development. Lua is usually known for creating video games.

Answer 2

And don't neglect Scratch. If you're just starting out, it's a really easy way to get going and experiment (its not just for kids).

Answer 3

C# for use in Unity and Visual Studio

Answer 4

Most games are made using c++