SWAMI can't be reused. Things like name, bloodtype, fingerprints and measurements are locked and unchangeable once entered.
As far as the foods go, if you are already following the Nomad diet the foods are probably not going to be any more unusual then what is in the GTD book.
I always wonder when I see someone saying how American the foods are
it seems like half the stuff I've never seen or heard of. But I still manage to find plenty to eat