We just released support for RTL editing in the web app. You can edit RTL characters in every text field (short text, long text, markdown), dropdowns and radio buttons. Some things to note:

• This works out of the box for locales that are RTL but will not work for any custom locales, like "Custom Chinese" for example.
• It will align all the text to RTL, even embedded LTR text, so if you want to have big blocks of LTR text alternating with RTL, we suggest going through the path of composable entries where each text block's direction can be different from the others.