I don't know if this is of any help but the string of words (diamond diamonds buy sell trade) in Arabic looks like this:
????? ????? ???? ???? ???????
Since their writing is right to left (or am I mistaking? EDIT: no, you can clearly see that the last two are the same- ie diamond vs diamonds) the string would actually be (trade sell buy diamonds diamond). Anyway, none of these looks like the above to me.