a little ..
better would be arabic sites hosted on arabic servers ( even if the anchor text was in english)..if the eventual veiwer you were presenting serps to was searching /reading in english browser Id english ..and sh(e) was in an arabic speaking country ..as detrmined by geo ip
searcher browser language and searcher country ..trumps all
followed by site hosting country and language
followed by link site language and landing site language
closely followed by link site/page language and landing site language /page language
closely followed by anchor text language / site language / page language ..to landing page / text / page language /site language ..
the simple permutations listed above are called the algo ..which is more complex again ..
any on topic same language anchor link text works in your favour ..similar subject surrounding text on both sending and receiving page is even better ..
run page by page controls to see which works best for you ..and understand why the results vary from time to time :)
learn to fish