The arabic is hidden under Sheet and getWindowTwoRecord which cannot be accessed from HSSFSheet. Easiest is to add a getter and setter. This is needed to enable right to left sheets.
Created attachment 24368 [details] A patch that adds the possiblity to set the arabic property to HSSFSheet
Applied in r833537 Thanks, Yegor
The name "setArabic" is politically insensitive. I renamed it to setRightToLeft() - this name should be fine. The corresponding VBA property is called DisplayRightToLeft. Yegor