"MSAA ROLE_SYSTEM_ TEXT"
bdo is used to override the Unicode bidirectional algorithm, so in case of IA2 and ATK it affects on writing-mode text attribute. But I don't see any sense to have an accessible for it. Note, I don't know about OS X and UIAutomation, we need experts for that.
was fixed by bug 12703
Reopening as reminder to address for MSAA+UIAExpress and UIA, and AX.