The regional states were different from central empire in the following respects: 

(i) Regional languages: In different regions of India different regional languages were spoken. For example, Oriya, Gujarati, Bengali, Tamil, Telugu, Kannada, Marathi etc., are the regional languages. Literary works and local literature came to be written in these languages. From the 11th and 12th centuries, the regional languages came to be used in the official documents. However, a large number of official documents of the Delhi Sultanate and the Mughal Empire and some regional states were written in Persian. were

(ii) Presence of the local cults and religious affiliations: For example, the cult of Jagannath in Orissa was regional to Orissa. It became the cult of the state, whereby the rulers adopted it, built a temple for it and celebrated festivals around it every year. 

(iii) Development of local and regional art schools like Bihar, Bengal, Assam, Central India, Rajasthan etc. The various regional dynasties extended their patronage to art, culture, literature and architecture. art

(iv) The political and military visions of the regional states were limited by the regional boundaries.

(v) The regional states influenced each other in the area of architecture and political culture. 

(vi) There were networks of interaction through trade and commerce and migration of artisans from one region to another.