Btw here's proof. Here is ltr text and rtl עִברִית text عربي interspersed with no bidi override control characters to be found. Unicode can handle this, it ha

Btw here's proof. Here is ltr text and rtl עִברִית text عربي interspersed with no bidi override control characters to be found. Unicode can handle this, it has a heuristic algorithm for it. Note how if you try to select the text character-by-character, your selection does funny things at the rtl to ltr boundaries, because the byte order doesn't match the order on the screen. It really is handling the directionality changes, with the letters entered in "order" across changes, there is no funny entry or ordering going on, this is plain old normal unicode handling interspersed directionality changes just fine, with no bidi overrides. It just sometimes gets it wrong for the intent of the author. Especially when there are characters at the boundaries that are themselves not strongly associated as rtl or ltr (like ordinary "western arabic numerals" or punctuation). That's what the bidi override control char is for.