Since the last task of april fools contest is quite simple (comparing to other tasks), so on top of just making the program executable, I will try to output Hello world, with the combination of different language.

Original task:
Pascal & C++

//\
begin write('Hello world')end.(*
#include<iostream>
int main(){std::cout<<"Hello world*){";}

Python & C++

#//\
print('Hello world')
#include<iostream>/*
'''*/
int main(){std::cout<<"Hello world";}
//'''

C & C++
just kidding

Java & C++

//\
public class Main{ public static void main(String[] args){System.out.println("Hello World");}}/*
#include<iostream>
int main(){std::cout<<"Hello world*///";}

Chinese & English:

屌你世界
Hello world

Thank you for reading this post april fools shitpost. I thought of writing code that is executable in c++, python and pascal, but have no idea to fix the comment problem.
Feel free to share your idea.