QTranslator not working when used in a if statement

I added a translation file using Qt Linguist. Then I proceeded to use QTranslator when my app is loaded:

    QTranslator translator;
    bool loaded = translator.load(":/notizie_en_UK.qm");
    bool installed = app.installTranslator(&translator);
    qDebug() << "Adding translation" << loaded << installed;

This works fine. Now I wanted to use the translation only if the system language wasn't already the default language so I did the following:

QLocale::Language phoneLang = QLocale::system().language();
qDebug() << "LANGUAGE" << phoneLang << (phoneLang != QLocale::Italian);
if(phoneLang != QLocale::Italian){
    QTranslator translator;
    bool loaded = translator.load(":/notizie_en_UK.qm");
    bool installed = app.installTranslator(&translator);
    qDebug() << "Adding translation" << loaded << installed;
}
else{
    qDebug() << "Using italian";
}

However this doesn't work. If a system in English for example, the translator doesn't work and the default language of the app is used (in this case Italian).

The output from qDebug() is:

LANGUAGE QLocale::English true

Adding translation true true

The problem is that the translator object is destroyed as soon as the program execution exits your if statement's body where it was defined. What you can do is:

[..]
if (phoneLang != QLocale::Italian) {
    QTranslator *translator = new QTranslator;
    bool loaded = translator->load(":/notizie_en_UK.qm");
    bool installed = app.installTranslator(translator);
    qDebug() << "Adding translation" << loaded << installed;
}
[..]

However you must take care off destroying translator object yourself when necessary.

UPDATE:

You may define a parent of your translator that will clean up its child objects. For example:

// The application is translator's parent.
QTranslator *translator = new QTranslator(app);