Great work on WordPress. One of the best CMSs I've ever used.
My website is partly in Hebrew and partly in English.
Every post I have is categorized as either Hebrew or English.
On my sidebar, I list all my categories.
I want that my Hebrew categories will be RTLed and my English categories won't. Using my knowledge, I assume that I cannot edit style.css or header.php because those files affect the whole website.
My website is here.
Thank you very much in advance and keep up the good work!