Mixed Culture @ work place

When i went to office on first day i came to know that our batch had equally people from all four southern states.Initially i felt somewhat unhappy since everyone were not from tamilnadu.But later on i was comfortable all my colleagues and learned a lot about their state and culture.Now i know few words in telugu and malayalam ! I guess the main reason for which the company has put all people from southern state is , we all should communicate only in English , since English is the common language for all.So now our English also becoming a bit fluent.