I'm not sure I understand your question to answer it correctly. Orpingtons were developed in England. When they were imported to the US in 1903, like almost everything Americans touch, they deviated from the established European, or English breed standard. For a very extreme look you can see these images...
Production (Hatchery Quality) Buff Orpington:
Buff Orpington - American Poultry Association (APA) Standard:
Buff Orpington - English-type (Conforms to the UK Standard):
So the term English now is used to describe the type of Orpington. My birds do not conform to the the APA SOP for Orpingtons. Additionally most of the varieties I have could not compete out of the AOV (All Other Variety) Class even if their colors were recognized by the APA which currently only recognizes Black, Blue, Buff, and White.
Production (Hatchery Quality) Buff Orpington:
Buff Orpington - American Poultry Association (APA) Standard:
Buff Orpington - English-type (Conforms to the UK Standard):
So the term English now is used to describe the type of Orpington. My birds do not conform to the the APA SOP for Orpingtons. Additionally most of the varieties I have could not compete out of the AOV (All Other Variety) Class even if their colors were recognized by the APA which currently only recognizes Black, Blue, Buff, and White.