[OHM] Mapping Ancestral Puebloan (native North American) ruins

[Akkana Peck]

Hi, all. I'm an occasional mapper, mostly just fixing hiking trails
and dirt roads, but I've stumbled on a problem trying to tag some
Ancestral Puebloan ruins in New Mexico, and I can't figure out how
to tag them correctly.

For instance, Tyoyoni Pueblo #475976060 in Bandelier NM (which also
include a bogus "Hamlet" designation, which I suspect I should
replace with something like Tourism=attraction).
Or the little ruins #2468238120 in downtown Los Alamos.

They're marked as Ruins, but the field for Historic Civilization
is empty. The allowed list is fairly limited, with no North
American options at all, unless that's what "prehispanic" is
supposed to be (prehispanic isn't mentioned in
https://wiki.openstreetmap.org/wiki/Key:historic:civilization).
Tags like prehistoric, bronze-age, etc. don't seem appropriate,
and that wiki page doesn't mention North America at all.

On the other hand, at Chaco, ruins are "Archaelogical Site"
instead of "Ruins". That has a similar but different "Historic
Civilization" tag, which excludes "prehispanic" but adds one clearly
North American civilization, "cahokian" (not mentioned on the
historic:civilization wiki page either).

When should "Archaelogical Site" be used vs "Ruins"? Is there a
reason the "Historic Civilization" lists are different for the two,
and are the meanings of the values documented anywhere? Is there any
chance of getting some North American civilizations added to the
list? Or is there some tag where the cultural name could be added
as a free-form fill-in-the-blank tag instead of needing to choose
from a list?

Thanks for any guidance.

        ...Akkana