There is no word stress in French, only sentence stress.
Technically, it is "prosody" - and it applies to a word when said alone. You'd not put the stress on the end of an English sentence due to it containing one French word, so typically you put that stress on the French word as if it were alone. Or at least, so I was taught in French class.
The reference to French is really only for guidance. This is something that English has mugged French for, and made off with it. As I noted earlier, in English the stress may be on either syllable.