Mohammed bin Salman has spoken English in public ONLY TWICE, both times to Trump.
Why would he do that?
I'm sure it's because Trump speaks to him in private in Arabic.
Melania speaks English, but Barron's first language is Slovenian. I'm sure Trump, Barron, and Melania converse in Slovenian.
All the Trump kids born of Ivana have a very slight accent when they speak English. Listen carefully. You'll hear it.
So to conclude, NOTHING Trump and Pence are doing is NORMAL.