As you can see on this board, teams icons are available in matching colors. You will have them included in the download files.

I have installed a very simple mod to have them changing with the skins. Teams icons are simply included in the image dir and are loaded when member change their skin choice.
Just ask if you need that mod. It will change also the button sets if you use more than one language.
Same for the language dropdown menu that you can see in the index page.