American the Beautiful

I was window shopping in Mbabane today. I stopped into a linens shop to look at the bedding. A salesman approached me knowing I’m American.
“Sawubona” I greeted him. (Of course everyone knows that word.)
“Yebo. Ujani?”
“Ngiyaphile”
He was impressed. I guess most Americans don’t learn all the way to ngiyaphile.
“blah blah blah, click click on-and-on in SiSwati.”
Yikes!!!!
“I don’t know beyond ‘Ngiyaphile’. I’m sorry”
Could I be any more uni-language deficient? I ought to just have a t-shirt made with a big American flag and the words, “My SiSwati done run out.”