As you may (or may not) know, peanut butter is pretty big in the US of A. We have the peanut butter and jelly sandwich, staple food of our youth, and a whole lot of candy bars whose primary ingredient (at least, as far as we can tell) is peanut butter (Butterfinger and Reese's peanut butter cups to name a couple but there are tons more).
In France, I don't think JIF (the peanut butter in a jar) is a household name and you would probably find Nutella (the very delicious chocolate and hazelnut spread) in its place at the usual grocery store. Nutella is commonly found in the US but, in France, it has a cult status, and that's another story altogether.
Peanut butter is just not popular in France (and probably in other places as well). Would I be able to name a single French candy bar that has peanut butter in it? No, and I kinda know my candy bars even though my knowledge of all things sugary is not what it used to be. Do you know of any? You can find candy bars with peanuts (like M&M's, formerly known as "Treets", or Snickers) in France but that's a completely different animal.
Oh yeah, in French, peanut butter is "beurre de cacahuète".