Is it feasible to travel to Europe only by mastering English?

Summarize the experience of places I have been and friends around me: 1. No problem at all: Finland, Sweden, Iceland, Norway, Denmark, the Netherlands and Belgium are said to have conducted a survey on where English is the most standard in the world. Sweden ranks first because of its high English penetration rate and no obvious accent. There are Copenhagen, Denmark, Oslo, Norway and so on. In these big cities, many people's English is close to the level of their mother tongue in communication, and the English penetration rate in small places is also very high. At least in the Netherlands, the English penetration rate is as high as 95%, while in northern Belgium, the English penetration rate in Bruges is also very high. In short, there is basically no need to worry about language problems when playing in these areas. Not only do passers-by speak English well, but public service departments and tourist attractions also have English explanations and explanations. Don't worry, play boldly. 2. There are some problems: Switzerland, Germany and Austria are good, and they are three German-speaking countries. I have never been to Switzerland, but I heard a friend introduce Zurich (German-speaking area). I have personally experienced Munich, Germany and Vienna, Austria. Generally speaking, the English penetration rate is lower than the first category, but there is no problem with basic conversation. The public service department is equipped with English explanations, but I met a conductor who didn't speak English in Munich. At that time, I was anxious and a little annoyed. But as a tourist, there is no obvious influence. Ticket offices and scenic spots of tourist attractions provide English services. 3. It's a big problem, but it doesn't affect tourism: the English penetration rate in Italy, Spain and Portugal is very low, which means that if someone asks for directions or other things at random on the roadside, they are likely to get stuck. It is also common for public service staff not to speak English. It is suggested to make a better travel plan in these places and record some local writing and reading methods of basic daily expressions. 4. There are serious problems, even affecting the tourism industry: France and Hungary (extended to other former socialist countries in Eastern Europe) In fact, the English penetration rate in Paris and Budapest is higher than that in the third category countries, but why does it affect the tourism industry? Because in these two places, I have experienced unfair treatment caused by speaking English (with subjective feelings, but I hope to be alert). In Paris, three times in restaurants and the public sector, I found that the service staff had a worse attitude towards speaking English. Although the problem was solved, it obviously affected their mood. Therefore, it is necessary to learn two basic French greetings to increase politeness: bonjour, merci and so on. In Budapest, it has nothing to do with speaking English, but because they are foreigners (there are basically no Asian immigrants in Eastern European countries, so they directly label Asians as foreigners), they are silenced by the staff at the railway station and forced to help us carry our luggage and charge, which gives people a bad feeling. It is suggested to make full travel itinerary planning and be vigilant in these places, and record the contact information of local police stations. 5. Britain's corrupt countries don't know the English level of the subject, but many friends in London say that they are a little behind when they first get into contact with the London accent. Just a reminder, don't worry about traveling in English-speaking countries. Generally speaking, there is nothing wrong with English when you travel to most European countries, plan your trip in advance and be careful. If possible, it would be icing on the cake to find one or two colleagues who can speak German or French.