I haven't found any info on adding fonts to the snapserver yet, but these articles on adaptec say it usually can't support asian characters. Actually, all the articles shoot down any idea of user customization:
Q:
Can Snap Servers accept Chinese character file names?
A: Snap Server currently supports code page 437 US English, 850 Western European, 865 Nordic, and 932 Japanese (SnapOS 2.4). File names with Chinese characters are not supported.
Q:
The Snap Server cannot handle files or directories that contain Japanese characters in their name.
Most of Japanese characters seem to be OK, but I found if the file/directory contains some specific Japanese characters, Snap Server does not accept it.
A: The US code for the Snap Server does not have support for Japanese characters.
The Snap Server supports one platform only.
The Japanese characters are supported only in our Japanese version 2.4 of the SnapOS. The Japanese version will only support the standard 127 Roman characters and all data will be lost with the OS conversion.