Locales like zh_CN and zh_TW seems to simply copy to the root-level HTML
lang attribute, causing malformed values with underlines in it. The practical downside to it is that the CSS
:lang(zh) selector simply won’t work, as it expects locale names with hyphens (
-) instead of underlines (
_). Can someone just make a fix to force-reformat the
lang attribute to have hyphens instead of underlines?
For zh_CN and zh_TW specifically, there are some additional locale name changes required per https://www.iana.org/assignments/lang-tags/zh-Hans-CN. Missing that doesn’t break too many things though.