How to make PDcurses and Russian language friends?

Question

C++ / C#

For some reason, the Russian language in pdcurses refuses to work .
My test code.

#include <curses.h>
#include <clocale>

int main()
{
  setlocale(LC_ALL, "");
  initscr();
  printw("Русский язык");
  getch();
  endwin();
  return 0;
}