Members are allowed to promote their services only in the advertising forums and within the rules for those forums. That means that anyone who offers their services in the main forums is spamming. The advertising forums are where you'll find what you're looking for.
Good luck with it,
I have no idea how you are going to tell the difference between what's good and what's bad unless you hire a Google engineer,
SEO is still a complete mystery to me after years reading about it.
SEO is the best part for website promotion because in SEO lot's of factors use like a Guest post, article, forum, blog, web 2.0 and many more.. but make sure all that website is high page rank and domain authority is best..
The best way is to hire someone from your region because they might have some experience with the Arabic words. Again you may have the option to start working on it by yourself. In this regard you would not only save you pocket but to get knowledge about internet marketing.
If you have the technical experience, you can also get your site to display the proper language based on the language of the visitor. If you know Arabic and English, and are catering to visitors of both those languages, set up your site to display it!