Do you have a french version?
There is a French translation of CiviCRM available here:
https://civicrm.org/download-translations

There is also a guide to 'Using CiviCRM in your own language' available.

It doesn't look like the WP demo site lets you change the language to test, but you can do it on the Drupal test site: http://dmaster.demo.civicrm.org/:  Administer > Localization > Languages