You must make sure that you have an Arabic font selected for your text in Premiere Elements.
You can select the pasted text and your titles workspace and apply the font then.
But the font must be installed on your computer in order for you to use it in the program, of course.
You've posted in the Premiere Elements forum. PRE cannot add true subtitles to a project. The text you add will always be on show.
If it is Premiere Pro you should repost your problem in this forum: Premiere Pro CS5 & CS5.5
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