Rare Usa-China w.
Get rid of the word ‘floor’ if you don’t like it. That’s not the issue. Call them levels if you want, some places do. Other languages have a distinct category for the ground level that separates it from the rest of the building and I’m saying I don’t think that’s necessary or very useful. If a different numbering system works better for another language than awkwardly going against the natural way of speaking, then fine, but it’s not a deficiency of english that we wouldn’t say “a one story building doesn’t have any levels”.