.... do you write games in AGS in?? C/C++ or some AGS stuff based on a specific language??
It would be good if it is C/C++, then I could continue learning it at the same time I see my result in a good way..
Why not try using it? That would probably answer your question for you.
AGS uses it's own specific language - I think it has similarities to C/C++ but it's definitely it's own language. Try a forum search, if you want a more technical answer.