Need more details/scope to see if this makes sense

Reduced the scope to just CJK ordering for now.

See https://discussion.fedoraproject.org/t/cjk-font-preference-configuration/96397 for context.

We discussed this issue in today's meeting, and we agreed:

• We have a workaround of PANGO_LANGUAGE for Pango but we don't have for Qt
  • We don't have any API to manage in application for PANGO_LANGUAGE
  • We may need to talk about this with the desktop people
• We may want to see some GUI for this settings

Some discussion from today's meeting
* We had a little more discussion about this internally last week: from the Gnome perspective relying on envvars is not great, so maybe there should be some gsettings config to help control this
* Pango first to have an API to apply a language, then gtk+ to access it through gsettings, finally gnome-settings-daemon to make it global in GNOME?

Another similar question https://discussion.fedoraproject.org/t/mutiple-locales-on-system-cjk-fallbacks/120082

Does it make sense to define an environment variable or fontconfig for ordering the language of unified characters? Something like FONTCONFIG_LANG=ja-jp;zh-tw;zh-cn. Can FC_LANG be used for this purpose?

You can but you need to make sure you have the primary lang id at the beginning of the list because this affects the default language.
So given that there are one who speak English as the primarly language and want to learn Japanese like the above example, they may want to have FC_LANG=en:ja.

I opened https://gitlab.gnome.org/GNOME/gtk/-/issues/7179 so we don't lose track of this.

This issue has been migrated to Fedora Forge:
https://forge.fedoraproject.org/i18n/i18n/issues/186

Please continue any further discussion there.