Alternate keyboard layouts, such as Dvorak and AZERTY, do not work with a USB keyboard that is connected to a USB adapter card.
*Includes the Macintosh Performa variations of these models.
Solution
The USB Adapter Card Read Me file notes that you may experience limited functionality using some USB input devices in certain applications, including Easy Access and the Keyboard control panel.
To use alternate keyboard layouts, or to use Easy Access, use an ADB keyboard with your computer.
For more information on the USB Adapter Card Support software, please see article 31132: "USB Adapter Card Read Me Document and Software Download"