Below is a list of issues, as of version 0.16.51, ordered by descending severity in terms of effect on UI/UX.
This topic was previously discussed at length in this thread (...and many links in this post lead there).
- Line breaks reverse line order
- Reversed UI direction
- Logical-to-visual text reversal script not applied to mods
- newline is used to denote line breaks
These are the major things that come to mind. If I see anything else I'll update this post. I encourage other players who are interested in RTL to add their own issues either as replies, or send me a PM and I'll update the OP.