Yes interesting indeed. We (those who have parents and/or grandparents from Italy) also have words that are unique to us, as I guess most nationality/ethnic type folks do.
For toilet/Loo, we call it the Ba-Cowze, LOL, not too sure of the spelling. The reason behind it is when the old timers came out from Italy, most coundnt afford housing with good indoor plumbing, so the “Head, John, restroom, was just a little shack the size of a phonebooth which was in back of the house.
So, if you say backhouse really fast with an Italian/English accent, you get Ba-Cowz.
LMAO, I’m sure your all very interested in that.