RESOLVED MOVED 235495
HTML lang attribute doesn't always call font's LOCL feature 
https://bugs.webkit.org/show_bug.cgi?id=235495
Summary HTML lang attribute doesn't always call font's LOCL feature
Ben Mitchell
Reported 2022-01-23 10:24:25 PST
Some languages are not working on Safari as in other browsers. Test page: http://test.fontpad.co.uk/Testing/MyanmarLOCLTest.html Along with the default Burmese numerals, the font contains localisations for Khamti (lang="kht"), Pa'O ("blk"), Pwo ("pwo"), Aiton ("aio"), Phake ("phk"), which are accessed using the font's LOCL feature and a lang attribute on the HTML element. All of those work fine in Firefox and Chrome, but Safari shows only the Khamti localisation. (Shan and Tai Laing / Shan Ni have their own codepoints so no substitutions are needed.)
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Radar WebKit Bug Importer
Comment 1 2022-01-23 11:37:54 PST
<rdar://problem/87944426>
Myles C. Maxfield
Comment 2 2022-01-23 21:09:31 PST
It looks like the issue is in the underlying platform shaping engine, not WebKit. So I'm going to mark this bug as "moved" and we'll continue investigation internally in radar.
Myles C. Maxfield
Comment 3 2022-01-23 21:13:01 PST
("underlying platform shaping engine" = "Core Text")
Myles C. Maxfield
Comment 4 2022-01-24 21:20:29 PST
See also: https://bugs.webkit.org/show_bug.cgi?id=235558
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