Hello, @houijiaymen,
Done, I have translated your site in the French language, now you can change any translation as per your requirements from here: https://elsou9.com/wp-admin/admin.php?path=languages%2Floco%2Fthemes%2Fxstore-fr_FR.po&bundle=xstore&domain=xstore&page=loco-theme&action=file-edit
And also from here as well: https://elsou9.com/wp-admin/admin.php?path=languages%2Floco%2Fplugins%2Fxstore-core-fr_FR.po&bundle=et-core-plugin%2Fet-core-plugin.php&domain=xstore-core&page=loco-plugin&action=file-edit
Regards 8Themes Team.