Dear Mr/Ms

I was born in france in 1971. I was in france until 1975. At 14 years old I also was in france for 1 years. How I can have dual nationality of france?
If my child is born in France, he/she have the france nationality?

May be you should check at the France government web site.
Your child born in France can get the U.S. citizenship, if you are a U.S. citizen and are present in the U.S. for a minimum of 5 years.