Bookstore in Lucerne

I am not sure what you mean by "American" groceries... not all brands are available in Europe so it is best not to be picky. Just ask wherever you are staying for where the nearby grocery store is. I never had a problem shopping there as everything looks much the same as in North America.

And I really would be surprised if bookstores in Switzerland do not have English books. Even the Swiss currency has English written on it.

Explain -- American groceries ??? Is there something in particular that you are looking for or need.

I suppose that means French's mustard in lieu of Dijon.....