VYPER 2.0 METHOD
With Vyper 2.0, you can customize almost all of the text of the buttons, contest descriptions, and emails that are sent out.
VYPER 1.0 METHOD
You can customize the default text/verbiage for, not only the referral emails for your contest, but almost all text within your contest.
You can do this is in the Translation & Text Customization. Here's how to get there:
1.) Select the contest you want to edit and click Settings at the bottom:
2.) Click on Translation & Text Customization:
3.) Click on Translate Contest:
4.) From here you can change the text to any language. You can also just change the words and keep it in the same language. For example, here we kept it in English, but changed the wording for the Referral Email: