Whats the most simple way to create a FlexLayout with 2 - 4 images as content?

Hi, I want a FlexLayout to select my App's current language, which should be displayed as a well organised set of flags (starting with German and English flag) So, do I need a ViewModel for that, or - what I would prefer - can I put the image source list somehow directly in the XAML file of my language selection page?
If yes, can someone give me plese a hint, how to do that?
Thanks,
Hermann