I don't know that the program is capable of adding text that reads right to left, erezbarnir. Sorry.
No one knows the new features and the existing features of the new version of Premiere Elements which is expected to be released soon (September October 2015).
The current version is still Premiere Elements 13/13.1, and the new version is expected to be named Adobe Premiere Elements 14.
I wonder if you could draw Adobe Staff attention to your question using Premiere Elements Facebook
This is not Adobe, rather use to user.
There isn't support for it, but you can use www.langover.com to switch the order of the letters.