The RTL feature was discussed here a while ago, the last thing I knew is that it was only possible through adding this short html tag in the MD editor
< div dir='rtl'> arabic text < /div>.
(auto instead of rtl does the same but only once. It follows the direction of the first letter it finds)
It's not a perfect solution, but that's what was said then, and it works but adding a button to just add it while one types or any other solution would be great.
Also there is no Arabic dictionary in the dictionaries list. It would be great if we can add it.
Thanks in advance