[twiss]

If you select an RTL interface language, the UI becomes RTL. And in Chrome, you can select RTL in the editor in the context menu. Are you looking for something similar to that in Firefox, or are there any other issues with RTL?

[mejin]

What I would like to do it write in both a RTL language and a LTR language: (second line is a translation of the first) Hello, world! שלום, עולם!

However, the exclamation mark in the second line does not come at the end of the sentence.

This is not good: https://image.ibb.co/b5dC7b/Screenshot_20171102_083647.png This is good https://image.ibb.co/kAdjLw/Screenshot_20171102_083825.png

Changing the interface language didn't seem to help: https://image.ibb.co/k2gtDG/Screenshot_20171102_084103.png

[twiss]

In Chrome, if you select the second line, right click -> Writing Direction -> Right to Left, it seems to do what you want. Does that help?

[mejin]

Yes, that works. (I can start using this more). As a suggestion maybe you should add the writing direction to the top options. I would not have thought to check the right click menu for anything other than cut/copy/paste, spell check and other less important things.