The blurp on the project page at translatewiki says:
The WikiReader (homepage) is a device that comes specifically designed to facilitate your focus in a world with constant interruptions. With three simple buttons and three million topics, WikiReader brings the iconic Wikipedia to all generations. The WikiReader software is available under the GPL.
There are 32 messages to translate, so if you think of buying a WikiReader, you can not only check out if there is a localisation, it will take you relatively little effort to help yourself.