Does DejaVu has support for CJK (chinese, japanese, korean) glyphs?

Question 1

The wiki Plan page talk about reusing others work :

CJK - best would be to reuse others work

The status document about language coverage indicate that's there is no glyph for CJK:

ja Japanese (0/6537) (0/6537) (0/6537)
ko Korean (0/2443) (0/2443) (0/2443)
zh-cn Chinese (simplified) 0% (2/6765) 0% (2/6765) 0% (2/6765)
zh-hk Chinese Hong Kong Supplementary Character Set (0/2213) (0/2213) (0/2213)
zh-mo Chinese in Macau (0/2213) (0/2213) (0/2213)
zh-sg Chinese in Singapore 0% (2/6765) 0% (2/6765) 0% (2/6765)
zh-tw Chinese (traditional) (0/13063) (0/13063) (0/13063)

Alternative

The Droid font has support for CJK and is under Apache License

Question 2

DejaVu doesn't support but Google-droid font supports.
In RPM you can install like this:

# yum search google-droid
# yum install -y google-droid-*-fonts

Question 3

The answers I see advertising "Droid" fonts as supporting Asian languages are false. No, the "Droid" fonts do not support Asian languages. (Droid Regular only has 197 characters in it. Hanzi has about 5000!) And worse, many web sites sell these fonts at up to $89 per sub-version.

One free font family which does support the Asian languages is "Gnu FreeFont", available here:

http://ftp.gnu.org/gnu/freefont/

Gnu FreeFont supports Russian (Cyrillic), Greek, Arabic, Hebrew, Armenian, Georgian, Indian scripts (Devanagari, Bengali, Gujarati, Tamil, Malayalam), Chinese scripts (traditional Hanzi, simplified Hanzi, Bopomopho), Japanese scripts (Kanji, Katakana, Hiragana), and many others.

And another free font which covers nearly every language on Earth is "Unifont", which can be downloaded from here (right-click, select "Save Link As", then right-click and select "Un-Block" after downloading):

http://unifoundry.com/pub/unifont-11.0.01/font-builds/unifont-11.0.01.ttf