Best Guess: The Salvadoran can go back to El Salvador with or without child (who has U.S. birth certificate). Then U.S. citizen can file fiance visa. Once approved, Salvadoran goes to US consulate in...
That depends on where you settle in. If you settle into a place that would make you a citizen, then you're a citizen. If you settle into a place that wouldn't make you a citizen, then you're not a...