Would it be possible to make MediaWiki expose the intended user interface
language via CSS? Being able to do something like
html.uselang-de #p-navigation h5 {
text-transform: none;
}
would make it easy to solve bug 1553, "Navigation headings should not be
lower-cased in German":
https://bugzilla.wikimedia.org/show_bug.cgi?id=1553
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Remember the dot
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