Main language in notifications

The main language of my site is French
I installed both EasySocial and EasyBlog

I have installed, of course, the French in easyblog, but I receive the notifications by email in English, and some functions of the site in frontend are in English (see attached files)

I do not have a problem with EasySocial displays and notifications

Can you help me on this point

Thanks in advance

Regards

Frank