Absolutely possible to implement accounting for a French company in community. Basically, from the Community Edition some certain functionalities such as Budget, Assets and Accounting Reports has re moved. Odoo recommending those functionalities only in Enterprise version. But nothing to worry, we have some community modules to fulfill those stuffs in community edition.
For the Accounting Report, you can check this: Accounting Reports Odoo 12 Community Edition
Module: https://apps.odoo.com/apps/modules/14.0/accounting_pdf_reports/Odoo 12 Accounting Reports
This module is available for V12, V13 & V14 CE