Thank you is so important, you can pretty much say it everywhere, but Jennifers has it in just about every language in the world:
Domo Arigato. Japanese
Xie Xie. 谢谢 Chinese.
Cámơn. Vietnamese
Ar Kun. Khmer (in Cambodia)
Komapsumnida. Korean
So thanks to everyone for making this last trip work 🙂