Alert in Englishs after update to V6.3.5

I guess alerts are sent in the language selected by the user who lanched the cron process.
It should be an admin.

But what you may have faced is that when PHP is stopped while CRON is running; CRON process is automatically launched when fisrt user connects, and it is possible that CRON take into account current language for this user.

To fix, juwt connect as admin, with correct language selected, go to administation screen, stop and start CRON.

We'll add an improvement in order to force CRON to use default language.