My site language is english, character set use utf-8, but it's displaying some looks like Arabic ads, does anybody know why? Is google adsense too smart to guess sometimes?
How long has the site been up? Also, is there a high number of visitors from the Arabic geographic region?
I just inserted the ads in it today. It's a subdomain, free hosting reseller service. As you said, there might be a high number of visitors from Arabic region to that free hosting service.