What is CSS unicode-bidi?

The unicode-bidi is not intended for web designers, it’s for the document type definition designers.

However, to understand it, I know you would find no use for such property let me say the next.

Arabic is right to left language, to style it appropriately you give it “direction:rtl;” and this property is smart enough to distinguish between Arabic and English, if you wrote some combination of Arabic and English statement you will get what you expect, here is the thing, after adding the direction property try adding the following “unicode-bidi:bidi-override;” the result will be a mess, English words will be treated the same as the Arabic words, letters orders will be from right to left, and that's because you are over writing the concept Bi-directional text.

Have fun :)