unicode-bidi
This property allows the text direction to be overridden to support multiple languages in the same document. The value normal uses the standard direction and rendering. A value of embed allows a new level of embedding to change direction while bidi-override allows the direction property to override any predefined direction.
Example
<div><span style="unicode-bidi: embed; direction: rtl; background-color: yellow;">?here doing I am What</span>
This is just a test.
</div>
Browser and CSS Support Notes
CSS2
IE 5, 5.5, 6
Nav 6, 7
No Opera support