This thread is resolved. Here is a description of the problem and solution.
Problem: On the English version of my website, in the categories of clothing and accessories, the photos do not appear in the same way as on the French version: when we pass the mouse over, we should see a second photo, while there when we pass the mouse over the photos remains static.
Solution: Make sure that you checked the Duplicate uploaded media to translations and Duplicate featured image to translations options from the right sidebar when editing a product. This will make the hover option work on secondary language too.
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