We are to recognize the interplay between politics and language as a double feedback process of mutual construction and deconstruction. Lets drive our attention to the conditions that release such processes.
I point to at least two perspectives: i) the collision between two or more languages, developed independently by 'geographical' constraints; and ii) the emergence within one language, a change driven from the the 'geographical' inside but temporal 'outside', a collision with the self of the future (e.g. embryogenetics, phase transitions). These conditions constitute complete lines of study, but I will only stress on the second. Emergence of languages within a unique linguistic frame ressembles epigenetic phenomenon  and studying the latter may bring light to some mechanisms present in the former.
 "Epigenetics is defined as the study of the mechanism that produces phenotypic effects from gene activity during differentiation and development, or heritable changes in gene expression that do not involve changes in gene sequence." Definition extracted from Animal Functional Genomics Laboratory (
. Mississippi State University)