It is not just language. It is skin color (some are fair skinned like Europeans, some are dark skinned like Africans), food (North and South Indian food are ver

It is not just language. It is skin color (some are fair skinned like Europeans, some are dark skinned like Africans), food (North and South Indian food are very different), clothes, religion (which is very important in India), income levels (extreme poverty as well as extreme wealth), education (most of the country is illiterate, but there also world-class institutions such as IITs, culture (India has higher female participation in the workforce, in IT at least, that the US, yet, in certain villages there is "honor killings" and so on.) Yes, India is absolutely the most diverse country in the world, and it is many times more diverse than the US.