Display complex characters in Stellarium
While the default font file DejaVuSans.ttf of Stellarium contains a full set of Latin and Arabic alphabets, it does not include East Asian Complex Characters inside, as we are concerned about the download size. As a result you will need to find your own fonts if you wish the program could display Chinese, Japanese and Korean correctly.
Below is a list of GNU General Public Licensed fonts which have been tested and confirmed to be working perfectly with Stellarium:
Put the font file under the subfolder data of your Stellarium main directory and rename it to ukai.ttf. Edit the parameter base_font_name in your config.ini file. The next time you start Stellarium all should be working just like the way they are supposed to be.