provincialism

Concise Oxford English Dictionary © 2008 Oxford University Press:
provincialism/prəˈvɪnʃlɪzəm/

▶noun

• 1 the way of life or mode of thought characteristic of the regions outside the capital city of a country, especially when regarded as unsophisticated or narrow-minded.

• 2 concern for one's own area or region at the expense of national or international unity.

• 3 a word or phrase peculiar to a local area.

• 4 the degree to which plant or animal communities are restricted to particular areas.

– derivatives
provincialist noun & adjective.