I tried reporting this as a problem, but was redirected back here to submit it as a question to the French experts, so here I am.
As both spellings are correct, both ought to be accepted in the quiz. It probably just needs to be added as a correct solution to fix it.
Chris, I believe you're right, and I'm going to re-report this issue from the quiz results page, as I don't have any indication that my post in this forum has helped fix the problem.
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