Cho had never really been shy or hesitant to talk to people; she'd been popular in school and actually felt more uncomfortable when she wasn't around lots of people. She was definitely a people person and had overcome any lingering shyness or whatnot during Auror training - and as a byproduct of her training as well, she was used to taking in larger amounts of information at once.
"I see," she said, then continued, "Not really. I'm just good at hearing the differences in how people pronounce things." There was a much longer explanation as to why, but it wasn't entirely something Cho deemed necessary to go into with every person she met, so she was content to save it unless a further explanation was asked of her. "I've never met anybody from New Zealand before."