I have installed fonts-droid 1:4.3-3ubuntu1.1 and language-selector-common 0.129.3 from trusty-proposed. Droid Sans Fallback is the preferred font in case of a Chinese locale:
$ LANG=zh_CN.UTF-8 fc-match 'sans-serif'
DroidSansFallbackFull.ttf: "Droid Sans Fallback" "Regular"
In case of a non-Chinese locale, Droid Sans Fallback is the first Chinese font in the list:
I have installed fonts-droid 1:4.3-3ubuntu1.1 and language- selector- common 0.129.3 from trusty-proposed. Droid Sans Fallback is the preferred font in case of a Chinese locale:
$ LANG=zh_CN.UTF-8 fc-match 'sans-serif' ckFull. ttf: "Droid Sans Fallback" "Regular"
DroidSansFallba
In case of a non-Chinese locale, Droid Sans Fallback is the first Chinese font in the list:
$ LANG=en_US.UTF-8 fc-match -s 'sans-serif' | head -12 Bold.ttf: "DejaVu Sans" "Bold" Oblique. ttf: "DejaVu Sans" "Oblique" BoldOblique. ttf: "DejaVu Sans" "Bold Oblique" ckFull. ttf: "Droid Sans Fallback" "Regular"
DejaVuSans.ttf: "DejaVu Sans" "Book"
DejaVuSans-
DejaVuSans-
DejaVuSans-
Verdana.ttf: "Verdana" "Normal"
Arial.ttf: "Arial" "Normal"
n019003l.pfb: "Nimbus Sans L" "Regular"
Waree.ttf: "Waree" "Book"
DroidSansFallba
ukai.ttc: "AR PL UKai CN" "Book"
ukai.ttc: "AR PL UKai HK" "Book"
uming.ttc: "AR PL UMing CN" "Light"