Localization Dashboard preview, and explanation of UE4's text localization process

Hi,
Thanks for your tutorial.

I made a custom widget with some buttons to select language at first time install and run the game. and it’s saved to my save file, but I don’t know how i can tell to game how to use that language at startup.

I can read saved language from game instance at startup but i don’t how to tell the game every time runs with -culture=CultureName

I developing for Android / iOS

Thanks