The plugin supports multilanguage websites, but the plugin is not localized fully on french https://translate.ww.wp.xz.cn/projects/wp-plugins/glossary-by-codeat/stable/fr/default/
So you need to localize it for your website or wait that someone localize it for the community.
Thanks for your answer. I see in this table that the word seems ok since 2019 but it’s not translated on my website. Did I miss something?
With the word “thème” on this page for example https://lartdelatoile.fr/divi-stylist-academy-divi-lover/
The localization is not approved for the various strings, so you can’t get them in your website.
Another solution is to localize yourself the plugin but this require some knowledge how wordpress works or to reach the wp french community for that.