Web test results: https://w3c.github.io/i18n-tests/results/bidi-algorithm#rli_etc Webkit is the last major browser engine that does not support the new (in 2013, v6.3) Unicode bidirectional isolating control characters. The above link shows the tests that are failing and the expected behavior. Isolating behavior is already implemented for tags such as <bdi> or <span dir=...>. Version: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/603.2.5 (KHTML, like Gecko) Version/10.1.1 Safari/603.2.5 I was tasked by W3C I18N WG to submit this request (https://www.w3.org/International/track/actions/866)
<rdar://problem/60325350>