No, I never visited foreign countries, but I would definitely like to visit someday, and In my opinion, the challenges that most of the people would be facing is the Language barrier. But If that is the case with me, I would try to learn the primary language "please", "thank you", "hello", "yes" and "no" in the local language. But then also it would seem to be very difficult to cope up. Not being able to read the alphabet becomes very disheartening, but I would try my best to overcome this.