For your information the Photopost Support Personel do not monitor the general information forum usually. This is just that a general forum to talk about anything
Support is provided in support forums only.
Before You Buy
If you had posted your post in Before You Buy I bet you would have recieved an answer on this.
As far as the answer since Photopost has language templates you could design your own which uses right to left order if that is what you want. As far as complex script. Photopost is a complex script
The software is coded in PHP and open and templatized so you can customize it.