What is the best programming language for Grand Theft Auto 5

Question

I want to write games like that in future
https://code.sololearn.com/cpiUcFI1vQuN/?ref=app
https://www.sololearn.com/discuss/1103173/?ref=app

Answer 1

https://www.sololearn.com/Discuss/1111537/?ref=app
//for games

Answer 2

Unity makes it much easier, and unreal has the same effect.