Checks for lang and indispensable emails
CHANGELOG:
### ADDED
- [#746](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/746) Checks for lang and indispensable emails
Related card: https://trello.com/c/qRDAlgdd/1164-idioma-de-correus-massius
Edited by César López Ramírez