frappe-lms/lms/templates/emails/mentor_request_status_update_email.html

<div>
  <p>{{ _("Dear") }} {{ member_name }},</p>
  <br>
  <p>{{ _("Your request to join us as a mentor for the course") }} {{ course }} {{ _("has been") }} {{ status }}.</p>
  <br>
  <p>{{ _("Thanks and Regards") }},</p>
  <p>{{ _("Team School") }}.</p>
</div>