That is "Hallo world" in Arabic. I haven't the foggiest how to learn the language, so I'm sticking with google translate for now. I have listened to it, transcribed it in our Roman alphabet characters on paper, enlarged the Arabic and had a go at copying it down, right to left of course. It is annoying being such a beginner. I don't even know where to start a letter or how to do the little vertical bits, as I go along or added afterwards.
I really want to be able to read Twitter. At the moment the only words I can spot instantly are Allah Akbar, which is a good place to start, and Libya.
The next obvious place to go is YouTube for some video of people writing slowly!