as far as i know not. But it is not difficult to create your own Language file. On addons Page you can download the "language-edit" tool wich you can install as a normal modul. After install go in WB admin to options - show advanced settings and call the tool wich you find on the bottom of this page.
With this you can create a new laguage file (think AR) and translate all fields to your needs. Wehn you are ready you can simply switch in the settings to the Arabic language file.
Also it would be nice, if you are ready you can post the file here, so we can add it to our other language files.