Hi @claudeblet,
translating is done in another way in WordPress at the moment. I had a French translater but unfortunately we never heard from him again, uncompleting the translation.
Translations are now done in https://translate.www.ads-software.com/projects/wp-plugins/name-directory
There are some French translations at this moment, but the person with admin-access for that specific language can only approve them.
If you want to be a contributer, you can do that freely. But if you want to be an approver, I can request access for you. As a plugin author I cannot do that myself, unfortunately.
When the translation is complete and a lot of translation strings are approved, the WordPress update mechanism automatically installs them in your website.
Please let me know.
Kind regards,
Jeroen Peters