In iOS 9, Apple changed the key configuration for switching language.
Previously, this was done by pressing "command+ spacebar" when using an external Bluetooth keyboard. This is the key command the language shortcut key on the VersaKeyboard has been programmed to execute.
However, in iOS 9 this command is executed by pressing "control + spacebar". While you will be able to change the input language by pressing "control + spacebar" on your VersaKeyboard, unfortunately, we are unable to change the key configuration for the language shortcut key at this time.