Just to make things interesting, the Gouvernement Français decided it wanted two types of roundabouts. So you have you standard roundabout, where you give way to the left, and a different type. A roundabout with giveway lines on each entrance, so you have to giveway to oncoming traffic. These look like this:
Notice the giveway lines on the upper right and lower left. This means you give way to oncoming traffic, and just wait in the middle of the road.