Words that don't translate into English directly

http://roamandreason.com/2014/04/11/25-words-of-different-languages-youll-wish-we-had-in-english/

Words that don't translate into English.

Backpfeifengesicht- A German word referring to a face that needs a slap.

Sisu- A Finnish term that basically means the quality of being a badass. The word is usually equated with the Finnish national character.

L’appel du vide-

French – “The call of the void” is this French expression’s literal translation, but more significantly it’s used to describe the instinctive urge to jump from high places. (Seth jumping off the roof?)

Also there's a website devoted to words that don't translate to English called http://betterthanenglish.com/