You certainly can add US English keyboard layout though there is a little problem. I guess Italian and English layouts are different so you’ll have to remember English keys and use them instead of Italian ones. To add English language go to System Preferences (Mac OS) -> Language & Text -> Input Sources -> check US ->
Then go to Language -> Put English in the first place on top of Italian – >
Then go to Keyboard – > Keyboard shortcuts -> Keyboard and Text input -> check Select the previous input source.
It’s a piece of cake. Now you can switch to English layout as you work in fcp.
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