I don't see the language issue as being a problem.I understand he's already fluent in one or two languages other than Italian and by the time the World Cup qualifiers start next Autumn his English will be very good.
Actually it seems like he's not totally foreign to the language. He can speak it on a basic level. If I were him I wouldn't mind upping it up: what for? Press conferences? This is a bs issue. yeah, Benitez said that it is essential for half-time encouraging and direction. But Capello has Baldini with him who can manage 5 languages, in case. Actually, as he is wont to set a distance between he and his players, not knowing the language could turn up an advantage: if the folks playing for him can't understand him that will make him all the more redoutable to them. And he is wont to play on these psychological approaches.
Of course, his main problem is the keeper. That's why he brought with him Tancredi (former AS ROMA and italian national team keeper). I wonder what he can do with a monthly session (if at all) with your keepers, but I am sure they can only get better.
As one of his two only friends in football world said:"If something can be done with those players, he's the only one who can do it". Anyway, is worthwhile reflecting on the fact that nobody laughed when it was written that his aim (which it is) is to win a WC for England. it will be different after a first lamentable performance (which I'm sure it is bound to happen) but nobody laughed now.
About an english manager, that is only a proof of how little the english press know about football history. In Italy we imported english coaches until the '50's (some even later) because England was in the vanguard as to football strategies and training methods. That din't hinder us from winning 2 WC in the '30s. These people writing this kind of crap should tell which english trainer has accomplished anything worthwhile in the last 20 years. And if SCS is a prime example of their abilities...
I don't know whether Capello will accept a second in command. In case he might make sure he's not one who can understand italian like David Platt...