Russian Qt Forum

#include <QApplication>
#include <QLabel>
#include <QTextCodec>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QTextCodec::setCodecForCStrings(QTextCodec::codecForName("UTF-8"));
    QTextCodec::setCodecForTr(QTextCodec::codecForName("UTF-8"));
    QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8"));
    
    QLabel label(QObject::tr("∆ϴzx"));
    label.show();
    
    return a.exec();
}