I'm not sure what you mean by "a pedestrian green light". I have never seen a pedestrian green light that wasn't accompanied by a red light for cars? Unless may

I'm not sure what you mean by "a pedestrian green light". I have never seen a pedestrian green light that wasn't accompanied by a red light for cars? Unless maybe you're talking about cars turning left or right at a green light (therefore crossing the path of pedestrians who also have a green light)? I think drivers reasonably respect pedestrians in such situations at least in France, but for regular crossings, yeah it can be quite difficult, even though pedestrians theoretically have priority. It's usually better in core city centers, especially those cities which have extensive areas with reduced speed, pedestrian areas, etc. Nantes and Lille centers are somewhat comparable, but even in the "shared space with pedestrian priority" in Lille's very center (which is almost entirely allowed to cars), cars try to not stop for pedestrians, while in Nantes which has extensive car-free areas, cars will stop and generally drive more gently in most of the city. And just over the border from Lille, in Belgium, things are completely different and cars sometimes stop even if you didn't intend on crossing! I don't think there is any homogeneity in "mainland Europe" on this topic.