In case anyone is interested, Word just added bi-directional support for iPad, including proper support for Hebrew; see screenshot.
Bi-directional text support.PNG 49.44KB 0 downloads
Typing in English and Hebrew in the same line/paragraph works flawlessly now. Pasting from Accordance only works for a verse at a time. Pasting from Logos works for more than one verse; see screenshot.
Typing and pasting Hebrew.PNG 78.63KB 0 downloads
I also opened Word files with many different Hebrew fonts, and they all displayed correctly.