The keyboards are pretty much the same, but the arrangement of the letters changes.
When I was staying in the states for 3 weeks, I had to use an english keyboard, but after little configuration in the windos, I was able to use the finnish layout by pressing shift-alt and then I just typed out of the memory. Keys were still pretty much in the same places, but with different letters on the keys.
Switching back to english keyboard worked the same way.
Only difficulty becomes with the less used special letters, which changes the position more than the alphabetics (ie. \*^¨<| ...and so on).
I learned that incidentally, when I had accidentally pressed the alt-shift combination during IRCing and began wondering why the hell my keyboard turned into an english layout.
I'd say only very few people here uses a translation softwares for anything but to occasionally translate a word or two.
