Unicode-bidi

The   property is used in CSS and certain HTML elements. Along with, this property relates to the handling of bidirectional text within a given document. If a paragraph contains both left-to-right text and right-to-left text, the user agent applies a complex algorithm defined by the Unicode standard to determine how the text should appear. This property specifically controls the embedding levels and overrides for the Unicode bidirectional algorithm.

The CSS2.1 specification emphasizes that this property should normally be used only by DTD designers. In particular, authors, web designers, and users shouldn’t override it.

Values
HTML example:

CSS example: