And William's wedding was a state event. As was the Queen's funeral. And at both events, the Heads of State of Luxembourg, Liechtenstein, and Monaco were treated as less than the Heads of State of Norway, Denmark, Sweden, etc. And the royals from non-European countries were treated as less than their European counterparts. And of course, royal Heads of State, regardless of their continent, ranked higher than elected Heads of State.

Regardless of who has the final word in Windsorland, the seating chart will not follow international protocol.