Hopefully they have the right phrasebook...
Did Hungarians understand this extremely idiomatic American English that she speaks?
“extremely idiomatic American English”
No. No, it wasn’t extremely idiomatic. It was actually very good, very well enunciated, grammatically correct English. It is also very plain and quite lacking in slang and idioms (there were a few, I’ll admit). Also, it was not American for the simple reason that she is not American. She is Dutch, many of whom speak English better than a goodly number of our own fellow Americans.
Hopefully they have the right phrasebook...