I don't know about Italian (unfortunately), but definitely true for Afrikaans. Edit: the last "nie" always closes the sentence. "Die water is nie skoon nie".
If my mother ever said "aint", my grandma would teller "Ain't ain't in the dictionary." It was eventually added to the dictionary, but Grandma never accepted it use. Neither do I.
In my neck of the woods, it makes me smile when someone refers to their porch as a lanai. We ain't got no lanais here.