You can change the flow direction of text in the text editor if that is what you mean bu have no idea how you would be able type right to left.
To enlarge images or videos in this forum simply click on the images.
To change the speed of the flow simply extend the length of the text object to suit.
If that is not what you are after then I'm not sure if the program can. I know Adobe Premier has that feature. I think there are programs that allow the typing and maybe you could use one of those and then copy and paste the results into the Movie Studio text editor as it does accept and should display any true type font on your system although that should be selected first in the title editor.
The program does not support Right to Left languages.
The workaround is to create the text as an image in an image editor and save it as a PNG file with background transparency, importing the PNG file and animating, resizing as required.
You could also try creating the text in a word processor that supports Right to Left languages, copy and paste this into the title editor, and make the paragraph style right aligned, to see if it works.