Insert a DFF in a completion certificate and create a function

Summary:

Hello all,

I'm modifying a completion certificate using BI Publisher.
We need to change an information in the certificate if the course's certificate has a DFF valorized in a way or in another way.
Following some extra information to clarify Client's need:
We created a DFF visibile during the course creation under the "Learning Course Additional Attributes" section.
If the DFF value is "Yes", we need to have a specific written in the completion certificate.
Instead, if the DFF value is "No", we need to have another specific written in the completion certificate.

Is it possible?
Is there a way to recall a DFF in a certificate and insert it in a function to encoured client's need?