in fact the the Quran has some more signs(like punctation but a bit diffrent) which normal Arabic alphabet doesnt have. The exact meaning of a multi-meaning word can be given with this signs.

And someone who can read Arabic can read/understand Quran. The Quran is one of the most clear texts and the most literary text written in Arabic.
(it's always like that, At the time of Jesus, sorcery was vogue and God gave Him such abilites, At David's time, processing iron was vogue, he could render Iron with bare hands, at Mohammed's time the thing was literature, God send hiö poetic words. )

As for the translation part, it is of course impossible to exactly translate the Quran to English because of the high diffrence between structure of the languages.

The main diffrence between Bible and Quran is the understanding of God and Jesus.
I posted something about that difrences(im no expert though) in "Does bible teaches Jesus is God?" topic.