I dare say most travelers have a sense of what is required and when during their travels. I have been to many countries where they don't speak English, but if I come up to some check point then I usually figure out, by observing others, what needs to be done and how. if I'm not sure then I have my passport and boarding pass, the officer can choose what they want and I'm on my way.

I know many countries also have sheets in different languages which explain procedures, especially if you are about to be searched. but honestly, 99.9% of people can actually work out that if you set of a scanner, that there will be either a search, or the whole 'take off belt, take off shoes, take of watch' routine until you get through without setting off the device.