I was just giving the definition in the dictionnary... Even, if I am French from this side of the ocean, I am still French...
Lunatique when I was young always had a hint of crazyness... when we meant that someone was influenced by the moon, we were saying "il est dans la lune", he is in the moon...
Here taken in a dictionnary of synonyms, all the words that are synonymous of lunatique(lunatick) in French: bizarre, braque, cacochyme, capricieux, changeant, fantasque, fou, furieux, instable, maniaque, quinteux, tordu, versatile