@Mitsuya Shibata: Well, yes it *affects* Japanese fonts too, but it makes no sense that *this change* would increase the risk of picking Chinese glyphs under a Japanese locale.
OTOH, if I start Firefox with: env LC_CTYPE=ja_JP.UTF-8 firefox the default sans-serif font for me according to FF Settings is Droid Sans Fallback!! That might have something to do with it. I see now that the fonts-droid-fallback package is shipped on the ISO (did we simply forget to drop it?). So as a test, can you please uninstall that package: sudo apt purge fonts-droid-fallback and let us know if it makes a difference. In any case I think there is a need to reconsider the default font configuation for Japanese. The /usr/share/fontconfig/conf.avail/70-fonts-noto-cjk.conf file includes: <match target="pattern"> <test name="lang"> <string>ja</string> </test> <test name="family"> <string>sans-serif</string> </test> <edit name="family" mode="prepend"> <string>Noto Sans CJK JP</string> </edit> </match> while the Chinese equivalents have: <edit name="family" mode="prepend" binding="strong"> So, Mitsuya Shibata, it would be great if you could submit a new bug where we can focus on the Japanese font configuration. The reconsideration would probably affect multiple packages, but language- selector may be a proper affected package to start with. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to language-selector in Ubuntu. https://bugs.launchpad.net/bugs/2017076 Title: default Chinese font in snap apps is ugly Status in Snappy: Fix Released Status in fontconfig package in Ubuntu: Invalid Status in language-selector package in Ubuntu: Invalid Bug description: After installs Ubuntu 23.04 with Chinese language selected, the default font is chosen to AR PL UMing CN, which is very ugly. ProblemType: Bug DistroRelease: Ubuntu 23.04 Package: fontconfig 2.14.1-3ubuntu3 ProcVersionSignature: Ubuntu 6.2.0-20.20-generic 6.2.6 Uname: Linux 6.2.0-20-generic x86_64 ApportVersion: 2.26.1-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: pass CloudArchitecture: x86_64 CloudID: none CloudName: none CloudPlatform: none CloudSubPlatform: config CurrentDesktop: ubuntu:GNOME Date: Thu Apr 20 14:18:45 2023 InstallationDate: Installed on 2023-04-20 (0 days ago) InstallationMedia: Ubuntu 23.04 "Lunar Lobster" - Release amd64 (20230418) ProcEnviron: LANG=zh_CN.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> SourcePackage: fontconfig UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/snappy/+bug/2017076/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp