They say that a little knowledge is a bad thing. In France at the weekend I found that you can have quite a lot of knowledge but if it is not up to date then it won't serve you so well.
One such instance was at the mainline train station in Toulouse. At the main doors of the station and access to the platforms were these yellow machines.
A quick glance and the word 'compostage' is a new one to me. I immediately leapt to the wrong conclusion and thought how 'green' the French railways had become, providing a means of usefully recycling your tickets.
It was only later and after we had got onto the train, that we discovered that it is a requirement to validate your ticket before travel... and the French word for this type of validation...compostage.
Back to school for me!