I remember that the French always had traditional yellow lights in their cars up to mid, late 1980's. Somehow that tradition has gone now.
Not only on their own cars, but they expected visitors to France to change their headlights to yellow as well! Along with the beam deflectors/masks for right-side driving, British car accessory shops used to sell small bottles of some kind of (cellulose?) paint for tourists to color their headlights yellow.
I think France finally had to conceded defeat and change to normal white headlights under one of the common European standards directives -- Maybe around 1992/93?
