I am writing a paper in English. I have used the French edition of a book originally published in Dutch. Do I need to include both the French and Dutch editions in my works-cited list?

List only the version you are using—in this case, the French edition. You do not need to indicate in your entry the language in which the work was originally published or to provide original publication details, but if you wish to do so, you may include the information in the optional-element slot at the end:

Benali, Abdelkader. Le tant attendu. Translated by Daniel Cunin, Actes Sud, 2011. Originally published in Dutch as De langverwachte (Vassallucci, 2002).

Alternatively, you may provide the original publication details in an endnote at first mention of the work in your prose.