So I've picked up two versions of ISS2000 as the first version didn't include the proper box, it had a US box instead of a PAL box, I had to buy another one.

Well it turned out that the second cart didn't have the same gamepak code, while the first was NUS-NISX-SCN, the second was NUS-NISY-EUU and here comes the odd part.

While the SCN version features english and german languages, the EUU version only features Italian and French.... BUT!! haha, the menus in the game are still in english no matter which of the two languages you select.

Now that's just hilarious... what a bug!

You should hold on to the US box for ISS 2000.  It was a "rental-only" game in the US and as such a complete copy (or even a boxed copy) is very hard to come by.  A boxed PAL UK copy is much easier to find as it was a retail release.