How did the fourteenth amendment legislation identify diplomats?

i am uming, anybody in the United States representing foreign nations. For example: The 14th amendment with regards to citizenship are not considered to be natural citizens. So if a Man name Mr. Smithe was in Washington doing business on behalf of England's parliament, and he had a son born in the local D.C. hospital, then that child would nto be considered to be a U.S. Citizen.