About default translate (to RU) in Sign widget (Enter Name)

Customer support said that they can't do anything with this default design. And there https://www.adobe.com/products/wishform.html no adobe Sign product, and I didn't know where to ask about that. 

Just look at the pic below:

In Russian that field sound's like "Enter your FIRST Name"

And in most cases, people enter just first name.

but our lawyers say that we need the full name (second + first name).

how we can change/adapt this caption to Russian? Maybe someone knows?