for Chinese and other languages using non latin scripts, I use this http://www.wazu.jp/index.html
list of unicode font galery.
For example I found a very nice Bopomofo font, which is quite helpful on my Kobo when I don't know the pronunciation and the tone of a Chinese character: HanWangMingMediumChuIn (wp010-05.ttf) from http://www.wazu.jp/gallery/Fonts_Chi...aditional.html
. Unfortunately the pronunciation is not present for all the characters.