Customize Docusign notifications for same envelope, same language but different text for different people using resource files?

I'm still reading through the docusign email resource file.. wanted to get inputs on my scenario from experts who already know the answer:

I'm trying to achieve this: An envelope contains multiple participants - already done I want to send different email content (subject, body) to different participants (based on internal roles/logic). All notifications per envelope will be in the same language Need for localization of the email content

My understanding so far: I see that there's capability to customize the emails to be sent in different languages Challenge: How do I send different email subj/body for each participants?

https://www.docusign.com/blog/dsdev-blog-series-common-api-tasks-change-email-subject-and-body-for-each-recipient

Has information on how to do this using the API and SDKs.

Not sure which programming lang you'd like, here is C#:

// create a Signer recipient to sign the document, identified by name and email
// add an EmailNotification object with a custom email subject and email body
Signer signer1 = new Signer {
    Email = "inbar@example.com",
    Name = "Inbar Gazit",
    RecipientId = "1",
    RoutingOrder = "1",
    EmailNotification = new RecipientEmailNotification { 
        EmailSubject = "Custom email subject for signer 1", 
        EmailBody = "Custom email body for signer 1" }
};