Right-to-left_mark
Right-to-left mark
Bidirectional control character
The right-to-left mark (RLM) is a non-printing character used in the computerized typesetting of bi-directional text containing a mix of left-to-right scripts (such as Latin and Cyrillic) and right-to-left scripts (such as Arabic, Persian, Syriac, and Hebrew).
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RLM is used to change the way adjacent characters are grouped with respect to text direction. However, for Arabic script, Arabic letter mark may be a better choice.