I want to change the content of the email, which is sent after the second approval (Double Validation).

This is how the process looks like: When the HR-Manager approves the leave, an email is sent to the different followers. The current content of the email is something like the following :

"Status: Second Approval -> Approved"  (in german "Status: Zweite Genehmigung -> Genehmigt")

I want to change the content of this email, but I don't know how. Is there a way to change the content without changing the python code?

I use Odoo Version 12.