Qt5 How to translate App UI languages

1. Adding new language file name in app.pro file.

TRANSLATIONS += lg_ch.ts \
                lg_en.ts \
                lg_new.ts

1. Running terminal command:lupdate app.pro,to update the ts files. and general lg_new.ts file in the project directory.
2. Booting the translate tool,run terminal command:linguist
3. Opening ts file. and to translate. when finished translate,don't forget to publish it. then, you will get the lg_new.qm file.
4. Moving all the translated qm files to same directpry under pro path. and add them to Qt Resources file.
5. Using the translated file in your program.

void MainWindow::StActionLanguageEnglish()
{
    _pTranslator->load(":/lg/language/lg_en.qm");
    qApp->installTranslator(_pTranslator);
}

That's All.

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