The following problem occurs on my Android phone only, my Linux desktop is not affected.

The translation of my application works only properly when I call QLocale::system().name() after construction of QApplication.

int main(int argc, char *argv[]) {
    qDebug("locale 1=%s",qPrintable(QLocale::system().name()));
    QApplication app(argc, argv);
    qDebug("locale 2=%s",qPrintable(QLocale::system().name()));

    QTranslator myappTranslator;
    myappTranslator.load(":/i18n/translations");
    app.installTranslator(&myappTranslator);

    MainWindow w;
    w.show();
    return app.exec();
}

Locale 1 is always "C". Locale 2 is "de_DE" on my german phone.

When I remove the second debug output (locale 2=...) then the translation does not work anymore. Then the GUI has english wording.

So I see two related issues (on Android only):

1) QLocale::system() returns the wrong locale "C" when called before construction of QApplication.

2) QTranslator works only, when I call QLocale::system() AFTER construction of QApplication but BEFORE construction of the QTranslator.