If tourists go to visit a place (country, region) where people do not know their mother tongue or common language, does the language problem hinder them from enjoying the real experience of the trip?
I think that we would first have to define “real experience of the trip”, establish the tourists’ expectations for such trip, and investigate how close the tourists' language is to the language of the locals.
But, more generally, provided that the tourists have planned their trip carefully, I don’t think the language barrier will hinder them from enjoying the trip, especially if their focus is more on sightseeing and cuisine (which is typical of most tourists) rather than any deeper involvement with the local culture. Now, if the tourists expect to interact with locals more closely and learn about their culture from that interaction, I believe it’s the visitors/explorers themselves who should try to learn a local language before traveling.
If the travel is carried out in a short-term and planned way, certain regions are visited in the company of guides, local dishes are eaten, and mini-observations and discoveries can be made easily. Conversely, if our trip is not planned and scheduled, or if we are staying for a long time, it is possible that we will have difficulties as we will have to interact with the local people to ask about our needs.