My FI had to call Vistaprint to deal with our order.
Our postal code has the letter Z in it, and my fiance kept repeating it
4 - ZED - 7
The rep didn't understand him. ZED?
Finally he said "ZED like in Zebra". And the rep replied, "no, it's ZEE". She had never heard someone call it ZED before.
On the bright side, at least we knew we were talking to a call centre in the USA.