How do I change the WordPress layout to RTL while writing a post in a selected category.

I have two different post categories one for each languages. It is really hard to write in a right to left language because the ‘post editor’ does not support them and its in LTR layout.
I want the layout of ‘post editor’ to change to RTL when selecting ‘AR post category’ so that when writing in RTL languages I wont face difficulties while typing.