Yes, Script Studio supports right-to-left input and presentation by selecting Text Direction > Right To Left from the Format menu.
The software also fully supports Unicode input and its associated diacritics that when combined make up a single character.
Input of these special Unicode characters varies depending on your operating system and keyboard set-up but you can usually do this with keyboard shortcut combinations of the Option/Alt key and regular keys.
You can also select Insert Symbol from the Edit menu to choose from a character map of Unicode characters.