1. A method of determining the origin or an area of influence of an author, comprising: providing a repository including non-transient computer readable storage medium; storing on the repository a plurality of areas, each area corresponding to a geospatial area in which a dialect is prevalent; storing on the repository a plurality of dialect components each associated with a language and one of the areas; receiving a text communication; determining the language of the text communication; identifying at least one dialect component associated with the language of the text communication is present in the text communication; retrieving the area to which the identified dialect component is associated; calculating a probability surface value according to P ij = 1 - ⋂ i = 1 n ⁢ d ij l j. where P ij is a probability surface value for the area contained by dialect polygon i for language j, l j is an area contained within language area j, d ij is an area contained by dialect area i for language j, and ∩ represents intersection; and presenting representations of the retrieved areas and the probability surface value on a display.