Question about foreign language characters on GUI

Hi,all! I'm trying to let some foreign language characters be shown on GUI, like chinese or japanese or something. I drag the .ttf file from the Fonts folder to Unity and create a new GUISkin using this .ttf and apply it to a GUI. But still all of the non-english characters are "???". Is there anyone could give me a hand? I've stuck on this problem for a long time. THX!

my unity is 2.6.1, free version. Neither on Mac or Windows could Unity show the foreign language characters correctly on GUI.

Just use UTF-8 encoding for the script.

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@frank I know this is a closed thread but can you tell me how did you solve this? I am facing the same problem.