You're right. I get the same thing when using a German keyboard layout. Unfortunately, getting the right keyCode across browsers is a total mess at best and impossible at worst:
http://unixpapa.com/js/key.html

The best bet is usually using keypress. Maybe we should consider not returning a key name for keydown and keyup events at all.

Instead, we should start collecting keyboard-layout maps for people to use. People can add their own map.

In the API documentation you will find a tool that generates an alternate keymap for different keyboard layouts:

http://donejs.com/docs.html#!jQuery.event.key

Since the keyCodes are also different between browsers you need to open it in each browser you want to support and
press the keys that are not mapped correctly. It will generate a mapping that you can copy and provide with your application. Unfortunately there isn't a way to find get the current keyboard layout. The best bet is probably based on the browser language setting (which is unfortunately not very accurate already).