If this rightToLeft boolean is not designed for what I am looking then I need to find an alternative way to resolve my problem.
One such way is to get the lines after they are wrapped, and reverse their order:
in this example:
In the Lemur Label if I can get those wrapped lines I can create a new string by reversing the orders:
String newText = [-------------A------------] + [----------B--------|-----A-----]
now If I set newText into Label it will look correct I guess :
[--------------A--------------]
[--------B--------|-----A-----]
but the problem is for reading the lines I need to have access to Letters.java and LetterQuad.java classes from com.jme3.font package but those classes are not public so can not be accessed from outside.