Email Report Translation

Email Report works fine and I get Reports as attached file.
Subject in the email is "Report" and under the attached file (report) it says - "The report is in the attachment."
I know where the email notifications are and I have translated them. I can not find the template for this email.
Would you be so kind to guide me where it is. I would like to translate the subject and the sentenance "The report is in the attachment".
Thank you

At the moment those strings are hardcoded, so you would need to modify source code. Specifically ReportResource class.

Thanks