[Bug 491157] Re: language-selector fontconfig overides language fonts for CJK

[Gunnar Hjalmarsson]

Right, that's true, Yuan Chao.. (I forgot the comment I made on bug
#1581160; sorry.)

So, in other words, if you have a system with full Japanese language
support, you currently use Takao fonts. And if they are partially used
for rendering Chinese contents, the problem described in this bug report
is still present. Is that the case?

At the same time I suppose that the opposite - i.e. Japanese contents on
a system with full Chinese support - looks ok in 16.04, since Noto Sans
CJK JP is present on all machines.

So far there hasn't been a lot of response to my question at bug
#1581160. :(

** Changed in: language-selector (Ubuntu)
       Status: Incomplete => Triaged

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Title:
  language-selector fontconfig overides language fonts for CJK

Status in language-selector package in Ubuntu:
  Triaged

Bug description:
  Binary package hint: language-selector

  Description:	Ubuntu 9.10
  Release:	9.10
  Package-version: language-selector-0.4.18

  Ubuntu's language-selector fontconfig overide system seems to have
  a problem with CJK: particularly with rendering Japanese on a Chinese
  desktop and Chinese on a Japanese desktop (I am not talking about
  Han Unification ambiguities, but text with lang tags).

  close example:

  1. set a Japanese environment with language-selector
  2. start a new desktop session in Japanese
  3. open firefox
  4. go to http://zh.wikipedia.org/zh-cn/ for example

  Results:
  4. Chinese page is rendered mostly with Japanese glyphs
      with fallback to Chinese font for missing glyphs

  Expected
  4. Chinese page rendered in Chinese font

  Notes
  For comparison you can try in Fedora for example
  where rendering will respect the xhtml lang tag of the page.

  ProblemType: Bug
  Architecture: amd64
  Date: Wed Dec  2 10:29:30 2009
  DistroRelease: Ubuntu 9.10
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Alpha amd64 (20091014.1)
  Package: language-selector 0.4.18
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=ja_JP.UTF-8
   LANG=ja_JP.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
  SourcePackage: language-selector
  Uname: Linux 2.6.31-14-generic x86_64
  XsessionErrors:
   (gnome-settings-daemon:1348): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
   (gnome-settings-daemon:1348): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
   (nautilus:1409): Eel-CRITICAL **: eel_preferences_get_boolean: assertion `preferences_is_initialized ()' failed
   (polkit-gnome-authentication-agent-1:1429): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed

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