Emails from Let's Encrypt extension in Plesk are sent in English only.
Is it possible to change the emails content, for example translate it into German?
It can be done via Plesk in Tools & Settings > Notifications under Plesk section > Let's Encrypt certificates auto-renewal failure (customer's digest) and Let's Encrypt certificates auto-renewal success (customer's digest) > Edit notice text button on the right:
Note: placeholders should be untouched. After the change Let's Encrypt notifications will be sent with the new content to all users.