Change the final approval completed sent email

Summary:

Content (please ensure you mask any confidential information):

Hello, when a user approve an email, there is this system generated email:

We see that is is also translated:

We want to personalize this message. Where we can find it and change it?

We tried to use an email template created by us, but we don't have a way to put as "Dear name.surname@company.it" as there is one template but more than one approver acording to the approval workflow so we don't know which field to use. Can you help me?

Thank you,

Silvia

Version (include the version you are using, if applicable):