The least translatable idiom from Italian in my head is "Ti voglio bene". It could be translated as "I love you", but that loses a lot of nuance. The literal tr

The least translatable idiom from Italian in my head is "Ti voglio bene". It could be translated as "I love you", but that loses a lot of nuance. The literal translation of "I love you" is "Ti amo". So in Italy you have two different expressions that are rendered by the same one in English. But the two are very much not interchangeable. "Ti amo" has a romantic connotation, whereas "Ti voglio bene" does not. What's more, you can also use "Ti voglio bene" in a romantic context, to mean that you love the other person, but not only from the point of view of a romantic relationship though. In a romantic relationship, especially between younger people, it can happen that one says "Ti voglio bene" well before "Ti amo", which has a heavier implication. On the other hand, "Ti voglio bene" can be used with a sibling or a friend, often abbreaviated TVB, whereas "Ti amo" would not be used in this context. As you can see, it is quite difficult to even translate the difference, but it is something well present in the head of italian people.