This is some Hello world for you:

Pascal

namespace HelloWorld;

begin
    println("Hello World!")
end.

C++

#include <iostream>
int main() {
    std::cout << "Hello World!";
    return 0;
}

Java

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}

Python

print(¨Hello World!¨)

BrainF*ck

++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.