I have not done this with Arabic but I have done it with Mandarin and Thai.
I believe Arabic writes from right to left which Mandarin and Thai do not, so I don't know if that is supported at all.
I would recommend you start by looking up as much as you can about how LabVIEW interacts with Unicode.
Showing Unicode characters on the front panel and on buttons isn't too hard as long as you don't need to change them while the program runs. Saving those characters to files or having people enter text in Unicode is a lot harder.
