Its easier in terms of organisation and more easier to deal with groups of people who speak the same language rather than a hodgepodge. Many in these groups are

Its easier in terms of organisation and more easier to deal with groups of people who speak the same language rather than a hodgepodge. Many in these groups are illiterate and have never written or read in their lives, it can be quite difficult to manage people when one doesn't even speak their language.