Hello,
Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for the delay and for any inconvenience this issue may have caused you.
Rank Math doesn’t have an option to remove the /product-category/ from your product category page. In your site, that would be the /etiquette-produit/.
However, you can change its value on your WordPress dashboard > Settings > Permalinks and change the value of the Product category base.

I hope that helps.
Thank you, and please don’t hesitate to contact us anytime if you need further assistance with anything else.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.