Hello
I don't see the SEO for Arabic website to be much different from SEO for English language website. We've personally have done some initial SEO for multiple language websites and it has very good outcome even without good knowledge of the languages (the keywords, and text was "optimized" by a client based on the suggestions).
So whatever you would have done for website in English, do the same thing for Arabic (good copy, good links, good code) and you will get results.
As for some local search engines, based on my experience, they are not even come close to sophistication of Google, thus ethical optimization process is even easier and spam techniques (highly not recommended) do not necessarily result in exclusion from Serach Engines.
As for the website you've attached - it is very poorly done from SEO, Marketing and simple execution points of view.
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