[WildHighlander57]

And what does u.s. law say about people that go to other countries and fill out citizenship apps or automatically become citizens of that country?

Probably it lets them do it, see the FAM posts I put up.

But the FAM documents don’t allow change of citizenship if child is younger than 16.

So I guess whatever citizenship 0 originally had, he kept.

And maybe also somehow got Indonesian along the way.

[jda]

what does u.s. law say about people that go to other countries and fill out citizenship apps or automatically become citizens of that country?

U.S. law does not recognize dual citizenship.