How do I show menu item hot keys?
It seems that the "equivalent" functionality is based on the starting characters and lots of typing as explained in Navigating to options in context menus's answers - in that question you can see that some menu items would be diabolically hard to select, involving typing whole words to disambiguate 2 items.

It seems that the application can specify priority, since the item selected isn't necessarily the first one that starts with what is being typed.