Where and what do i need to input to my clients e-mail so it will appear the cancelation link ?

Hy i really enjoy Appointments + . But i have 2 questions .

First: Where and what do i need to input to make appear in my clients e-mail the cancelation link ?

Second : How can i translate the front end Appointments plugin to appear in Swedish . Where do i need to make the changes.

Thank you ,

Adrian Helvig