I've been to Switzerland, and all over many countries in western Europe, and plenty of people speak English, especially at the places that matter like train stations, hotels/hostels. Everything else, even if there is a language barrier, is a fun experience. Buying things isn't that difficult, ordering food on a menu can be an adventure but entirely possible, and I found it to be not bad at all. The only place we had a really extreme language barrier that we encountered was out in Normandy region of France. NO ONE spoke English, not at our hotel, not at the train station in Caen, and not at any of the bars or restaurants, and we still had a blast there, and despite the language barrier, everyone was still extremely friendly and constantly smiling.