I’ve never seen anything marketed as fruit juice that did not consist of only fruit. If there is sugar added, it’s a different kind of drink and the label does not say that it is fruit juice. It might contain fruit juice, but it’s not called fruit juice. But I live in the western hemisphere so maybe the standards are different where you live.
Italy, and they're not called "Fruit juices" of course they're called "Succhi di frutta", of which fruit juices is the literal translation.
Yes they have always been called "succhi di frutta" even if filled with sugar and other stuff, I had no idea that in some countries those are not called fruit juices.
And 100% fruit juices have become more widespread only in the last years... (they're still less than a third than the juices you see on a shelf)