> it's much easier for an average Scandinavian or Dutch teenager or college student to get into computer science than for an average Italian or Greek.

Speaking as a Greek person who is also quite average, English was never a problem getting into programming. I live and work in the UK now, but when I first landed on these rain-sodden shores, my spoken English was bad and I had trouble communicating with people. Not so with computers- and I never had trouble with programming languages.

I think the same would go for Italians and even more so, since English has borrowed a lot from Latin, which is basically just an older form of Italian (with high school Latin, you can understand Italian perfectly well and even parse sentences on the fly as people speak to you :)

I think the reason why you may not find many Greeks or Italians, or generally people from non-English speaking countries in the history of computing is the opposite of what you suggest: any contributions they might be able to make are hard to transfer over to the English-speaking world. Any papers are in languages that are not understood in the English-speaking world and translation is not always available.