I see in Dorico, “Edit Instrument Names dialog” let you define what the singular name and plural name are. However, Dorico only uses singular name in all cases. For example, if I add a violin section, it only shows violin instead of violins. I cannot change or define if the staff has more than one players except fill the plural name in the place for singular name. I suspect it is a kind of bug, but let me know if I missed anything.