Document of record of Email notification approval to change the content of the send email

Content

Hello,

 When user gets an email notification for approval, he clicks on the approve button then an email open with send button.

We want to change the content of  this mail to be sent.

Please let me know if this template can be modified. We know that the initial mail notification content with approve button can be modified. 

It would really help us if the content of the email to be sent  can be customized.

Regards,

Unmesh