I was quite amused the first time I heard Italians talk about, “plum cake”, even more so when I realised that the cake in question was not made with plums at all but was actually a pound cake (as romantic as it sounds, actually, little, mass-produced, packaged “plum cakes” are commonly found in the supermarket as a breakfast item). To me, it always seemed as though this erroneous translation was a matter of someone mishearing “pound cake”.