Mike. This is an excellent news. Just to make sure, my nephew came to the US on December 1982, became a US Citizen on April 2, 1991 and traveled to Germany on September of 1996. My nephew's child is now 19 years old.
If this is the case, I am sure he needs to submit certain documents to the U.S. Department of State for his passport. Will that be the translated Birth Certificate?
Thanks again for your help.