For food fillings:
* garniture: This is the most general term for "filling" in food. It refers to the ingredients that are used to fill a pastry, sandwich, etc.
For other types of filling:
* remplissage: This is a more general term that can be used for any kind of filling, including things like filling a hole or filling a container.
For specific types of filling:
* farce: This refers specifically to a meat filling, often used for pastries like tourte or for stuffing poultry.
* crème: This refers to a creamy filling, often used for pastries like éclairs or for tarts.
So, the best way to spell "filling" in French is to choose the word that best fits the context.