Explanation:

Lepchas - a tiny Himalayan community spread across Sikkim, the Darjeeling Hills, the south-western parts of Bhutan, and the Ilam District of Nepal have succinct stories illustrating moral values and tales about their inhabitancy of these regions since time immemorial. The beauty in the culture of the Lepcha people lies in its simplicity.
Apatani,are a tribal group of people living in the Ziro valley in the Lower Subansiri district of Arunachal Pradesh in India. This tribe speaks the languages Apatani, English and Hindi.
Lushai tribe has drawn the admiration of all the eminent anthropologists of the whole of the Indian Territory. This tribal community is said to be one of the primitive tribes of India. Though the Lushai groups are also located in Mizoram, they are found especially in every hook and nook of the hilly provinces of Manipur state.
Chakma people, are a native group from the easternmost regions of the Indian subcontinent, they are the largest ethnic group in the Chittagong Hill Tracts region in southeastern Bangladesh, and in Mizoram, India, they are the second largest ethnic group, and in Tripura, India, they are the fourth largest ethnic group, and having sizable population in other parts of Northeast India, such as, around 50 thousand Chakmas in Arunachal Pradesh, India, whose first generation had migrated there in 1964 after the Kaptai dam tragedy, and 20-30 thousand Chakmas are in Assam, India.