Tracking bug.
Draft requirements:
https://www.mediawiki.org/wiki/Visual_editor/Bidirectional_text_requirements
Feel free to comment on them and edit them.
Version: unspecified
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=49998
https://bugzilla.wikimedia.org/show_bug.cgi?id=49999