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Revision as of 03:11, 19 June 2018 by Tagoh (talk | contribs) (update scope a bit)

CJK Default Fonts To Noto


Changes the default fonts for Chinese, Japanese, and Korean (CJK) languages to Google Noto.


Current status

  • Targeted release: Fedora 29
  • Last updated: 2018-06-19
  • Tracker bug: <will be assigned by the Wrangler>

Detailed Description

This proposal is to change the default fonts for CJK languages to Google Noto. typefaces mapping and the size consumptions will be changed as follow:

Language / f28 Sans-serif Serif Monospace
ja VL Gothic VL Gothic VL Gothic
ko NanumGothic NanumGothic NanumGothic
zh-CN Source Han Sans CN Source Han Serif CN Source Han Sans CN
zh-TW Source Han Sans TW Source Han Serif TW Source Han Sans TW
Language / f29 Sans-serif Serif Monospace
ja Noto Sans CJK JP Noto Serif CJK JP Noto Sans Mono CJK JP
ko Noto Sans CJK KR Noto Serif CJK KR Noto Sans Mono CJK KR
zh-CN Noto Sans CJK SC Noto Serif CJK SC Noto Sans Mono CJK SC
zh-TW Noto Sans CJK TC Noto Serif CJK TC Noto Sans Mono CJK TC

Note that all CJK fonts will be unified into one OpenType collection format file per weight-variants so there are no detailed estimation per languages for f29. the size consumptions are calculated from the font file size:

\ ja ko zh-CN zh-TW Total
f28 3.9M 13.8M 133.1M 77.4M 228.2M
f29 - - - - 288M

Benefit to Fedora

This change will provides better quality of rendering for all of CJK characters. we will have default serif for Japanese and Korean, also monospace for all of CJK languages and keep consistensies in look among those typefaces.


  • Proposal owners:
    • Update packages with the proper priority of fontconfig config files.
    • Update fonts group in comps
  • Other developers:
    • For application package maintainers:
      • If applications supports GUI or is relevant to draw any characters and they don't support TTC or OTC, they need to fix it.
  • Policies and guidelines: N/A
  • Trademark approval: N/A

Upgrade/compatibility impact

This change will be done by installing the updated packages. no need to update/modify any configuration files by the hand. the sort of this change may has the objective preference. the users can revert this by uninstalling font packages like this:

# dnf uninstall google-noto-sans-cjk-ttc-fonts google-noto-serif-cjk-ttc-fonts

How To Test

  • Check if the default font is changed to Noto:
    • ja
      • LANG=ja_JP.UTF-8 fc-match sans-serif:lang=ja
      • LANG=ja_JP.UTF-8 fc-match serif:lang=ja
      • LANG=ja_JP.UTF-8 fc-match monospace:lang=ja
    • ko
      • LANG=ko_KR.UTF-8 fc-match sans-serif:lang=ko
      • LANG=ko_KR.UTF-8 fc-match serif:lang=ko
      • LANG=ko_KR.UTF-8 fc-match monospace:lang=ko
    • zh-cn
      • LANG=zh_CN.UTF-8 fc-match sans-serif:lang=zh-cn
      • LANG=zh_CN.UTF-8 fc-match serif:lang=zh-cn
      • LANG=zh_CN.UTF-8 fc-match monospace:lang=zh-cn
    • zh-tw
      • LANG=zh_TW.UTF-8 fc-match sans-serif:lang=zh-tw
      • LANG=zh_TW.UTF-8 fc-match serif:lang=zh-tw
      • LANG=zh_TW.UTF-8 fc-match monospace:lang=zh-tw
  • Check the following items on applications (GTK+: gedit, gnome-terminal etc, Qt: kate, konsole etc, X/Xft: xterm etc, Others: LibreOffice, firefox etc)
    • Check applications preference if the above fonts are visible
    • Check applications if the above fonts are rendered properly
    • Check applications if those fonts are chosen as the default font for certain language when the generic family names like sans-serif, serif, and monospace is selected.
      • See the above table for mapping between language and families

User Experience

Users will see better quality of rendering for CJK characters on applications and on desktops.



Contingency Plan

  • Contingency mechanism: (What to do? Who will do it?) revert all of changes in packages and comps
  • Contingency deadline: Beta freeze
  • Blocks release? No


N/A (not a System Wide Change)

Release Notes