A simple test on 14.04 is to rename the symlink
/etc/fonts/conf.d/65-fonts-arphic-ukai.conf
to
/etc/fonts/conf.d/66-fonts-arphic-ukai.conf -------------------^
$ LC_CTYPE=en_US.UTF-8 fc-match -a | grep -iE '(ar pl|droid)' | head -7 DroidSansFallbackFull.ttf: "Droid Sans Fallback" "Regular" uming.ttc: "AR PL UMing CN" "Light" uming.ttc: "AR PL UMing HK" "Light" uming.ttc: "AR PL UMing TW" "Light" ukai.ttc: "AR PL UKai CN" "Book" ukai.ttc: "AR PL UKai HK" "Book" ukai.ttc: "AR PL UKai TW" "Book"
Would that improve things?
It would give UKai lower precedence than the Chinese fonts preferred via 65-nonlatin.conf, but OTOH the latter are not included in the Chinese language support in Ubuntu 14.04+.
A simple test on 14.04 is to rename the symlink
/etc/fonts/ conf.d/ 65-fonts- arphic- ukai.conf
to
/etc/fonts/ conf.d/ 66-fonts- arphic- ukai.conf ------- -----^
-------
$ LC_CTYPE= en_US.UTF- 8 fc-match -a | grep -iE '(ar pl|droid)' | head -7 ckFull. ttf: "Droid Sans Fallback" "Regular"
DroidSansFallba
uming.ttc: "AR PL UMing CN" "Light"
uming.ttc: "AR PL UMing HK" "Light"
uming.ttc: "AR PL UMing TW" "Light"
ukai.ttc: "AR PL UKai CN" "Book"
ukai.ttc: "AR PL UKai HK" "Book"
ukai.ttc: "AR PL UKai TW" "Book"
Would that improve things?
It would give UKai lower precedence than the Chinese fonts preferred via 65-nonlatin.conf, but OTOH the latter are not included in the Chinese language support in Ubuntu 14.04+.