Translating Mailchimp validations

Hi,

I am using the embedded signup form from Mailchimp. I translated the form to Dutch using the Mailchimp website, however the website doesn’t give you the option to translate validations.

I also would like to remove the asterisk of the email field label, and add ‘(optional)’ to the name field.

I only have basic CSS/HTML knowledge, so I don’t know where in my files I can find this component and edit the validations and input labels.

Any ideas on how I can edit the validations and input labels?

Thanks!

The page I need help with: [log in to see the link]