How do you use multiple coding langauges on one project?

Question

I understand websites or apps often use more then one program work, how do you use more then one coding langauge on a singular project

Answer 1

Check this same question here.

https://stackoverflow.com/questions/636841/how-do-multiple-languages-interact-in-one-project

Answer 2

How do you execute a js function in html(by calling the function with the parameters) kinda the same principle just instead of calling a function you do this with a executable or a script with the parameters.