When I attempt to restore my dictionaries, the following message is displayed:
This is not Test User account.
Please create a new account in the Sandbox environment.
You have a jailbroken device, therefore the App Store does not allow you to restore your in-app purchases (i.e. download again those apps that you purchased from within an application).
Your previously purchased dictionaries can be successfully downloaded using the same account on a non-jailbroken device. Jailbroken devices are not supported.