MinGW Unicode error

Question

"english language" - OK
"other language" - OK
L"english language" - OK
L"other language" - error: converting to execution character set: Illegal byte sequence

For example:

#include <iostream>

using namespace std;

int main()
{
    wcout << L"ś" << endl;
    return 0;
}

Gives that error.

I'm using the newest version of MinGW c++ compiler and I want to make multi-language application and that's the main problem for now.

Answer 1

The problem was with my IDE. It was saving source files in bad encoding, changing it to UTF-8 solved it.