breadcrumb translation

Hi

on the portfolio item page, I just need to change “home” label by “Accueil” label on the breadcrumb zone, How can I do that? I installed a child theme, I change the file /includes/boc-framework.php but the theme does not take my changes… I tried to modify the theme/fortuna/languages/en.po file it does not work as well… Can someone help me to do this?

Thanks