Immigration Site

Hi,
We have our interview scheduled for Feb. 20th, and were compiling and copying all the documents we need to bring. I have a question about two of the items on the list. First, "If you have children, bring a Birth Certificate for each of your children" and farther down on the list it says to bring "Birth Certificates for all children of this marriage, and custody papers for your children and for your spouses children not living with you"

My husband has children from his previous marriage, but we dont have children together. His children live with their mother here in the U.S., but their birth certificates are not in English.

My questions: They are indeed asking us to bring the birth cert. for his children from his prior marriage? And if so, do we need to have them professionally translated? (we typed up some translations of our own a couple of years ago for the school system).

Thanks!