I've always stayed the course with Larousse.
I agree that SEASONING something refers to adding salt to a preparation to draw water, enhance the natural flavor or making it richer.
I also agree that FLAVORING something refers to adding things like, oregano, thyme, pepper, cinnamon, curry, basil, etc. to impart their flavor into a preparation. These type of seasonings should not be used singularly and should compliment each other in preparing a well designed dish.
So I feel that seasoning and flavoring are two different things. I personally think that a well developed preparation, most times, include both Seasoning and flavoring.