That's not going to be an issue in this forum; we already have the following sub-boards that use RTL text:
Surprisingly it is somewhat broken for Farsi! You see text/paragraph alignment is not enough, the text direction has to be changed otherwise user has to manually change the "paragraph alignment" to "Right Align" like the line below:
Example of paragraph right alignment
And if they include any English words, the sentence will be broken.
Surprisingly enough it only affects Farsi not Arabic.
Arabic example from
https://bitcointalk.org/index.php?topic=5346647.0:

Farsi example from
https://bitcointalk.org/index.php?topic=620798.msg57940515#msg57940515:
The correct sentence should be like this:

It also doesn't support Arabic numbers either, they show up as roman.
