Use the FormCalc, JavaScript, and XML Source Syntax Formatting dialog boxes to define the font and color settings for the FormCalc syntax, JavaScript syntax, and the XML source syntax.
To display Arabic, Hebrew, Thai, and Vietnamese characters in the Script Editor or XML Source Tab, you must change the font settings that LiveCycle Designer ES uses in the Script Editor and XML Source tab. Otherwise, LiveCycle Designer ES displays rectangles where the language-specific characters should be. For example, set the font for Arabic to Adobe Arabic, for Hebrew to Adobe Hebrew, for Thai to Adobe Thai, and for Vietnamese to Myriad Pro or Minion Pro.
See also 

Syntax Formatting dialog box