Translation from english to french

Hi. I’m using your theme on a website and it works great except for a few translations in French, specifically the dropdown sorting menu on the category page and the order confirmation page. I’ve tried updating the .po and .mo files but they do not update. Please help me. The clients are french and don’t necessarily read english. It is very bothersome that they have to try to figure out what “your order” means and they cannot sort properly. Thank you.