Aregional, social, or ethnic variation of a language is known as a(n)

Dialect

A dialect is defined as the social, ethnic or a regional variation in a language that is different from the standard use in terms of idiom, pronunciation and in vocabulary.

It is most often applied to local or regional speech patterns. A dialect which is associated with the particular ethnic group is called as ethnolect and the regional is termed as regiolect.

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .