Absolutely, I mentioned this in the first part of this post when I outlined that any policy in regards to this would be best applied to endemic species where there are not multiple indigenous languages naming the plant. Hawaii and New Zealand may be more exceptional in this case as there are high rates of endemic species and only one indigenous language.
I’m not quite sure I understand how regional names are added or maintained. It seems to be opt-in on the user side, and not incredibly well documented. It also seems to be invisible to non-curators as to which taxa have regionalized names and which do not.