Top 5 hard words to translate:

1.) Mamihlapinatapai - a look shared by two people with each wishing that the other will initiate something that both desire but which neither one wants to start.

2.) Schadenfreude - pleasure derived from the misfortunes of others

.... That's actually all I have... I've known about Schendenfraude for a while (as should any other person who roots against the Yankees), but Mamihlapinatapai is a new one. I digg it.