Diglossia:
Contemporary languages and dialects, as they figure in the lives of most Indians, are a far cry from the stylized literary forms of Indo-Aryan or Dravidian languages. North India especially can be viewed as a continuum of village dialects. As a proverb has it, "Every two miles the water changes, every four miles the speech." Spoken dialects of more distant villages will be less and less mutually understandable and finally become simply mutually unintelligible outside the immediate region.