When exchange students apply to study abroad one of the  main reasons is to learn different language. For most of non-english speaking students its a challenge. They usually aim for english, spanish, german, Chinese and russian.But which language is best to study?English is a very important and necessary language in the world of business, technology and entertainment, therefore English speaking countries are one of the most searched for exchange programs.

http://digitaljournal.com/article/276960

This article talks about weather english should be a universal language so miscommunication can be avoided.

Another issue comes up thought, when english speaking students travel abroad to learn a little bit of english, but many times they are placed into an english school or foreign students can speak english.
This is one of the examples from exchange programs organized by rotary-www.rotary.com where I have interviewed a first hand source.