Currently Mabox is available in Polish and English. There are two ISO images. If you by mistake download and install Polish image, you will have pierogies in your menu and desktop (Conky) 
Next release will be only one ISO and install translated settings (like Conky, custom menus/sidepanels) - depending what Language you choose.
Also it will be fully translated to Spanish thanks to @ben_chile
Comming soon Next ISO changelog