Very impressive, she definitely has a talent for picking them up. I would've liked to hear more about her approach, all I could get was that she's made a point to learn the writing systems of all the languages she's learned, which I agree is a good move and something I enjoy as well. Japanese isn't her strongest language but she speaks clearly and formally, I hope she fulfills her dream to travel and use all those languages, it's such a great way to connect with people.
Impressive indeed, especially at her age! Even more so, if she picked up the writing systems as well (Chinese, Korean, Japanese, Hindi, Arabic, etc). Her Japanese is better than her (Austrian) German though.