[נפתר] Translation strings

Background of the issue:
I am trying to figure out how to translate strings in a custom PHP email template (with HTML) and to connect it to all GravityForms notifications on my site קישור נסתר.

Symptoms:
I am unsure how to translate strings in a custom PHP email template and connect it to GravityForms notifications.

Questions:
How can I translate strings in a custom PHP email template using WPML?
How do I connect translated strings to GravityForms notifications?