Using the Schulze model for Monte Carlo simulations of language competition, we include a barrier between the top half and the bottom half of the lattice. We check under which conditions two different languages evolve as dominating in the two halves.
@article{arxiv.physics/0702031,
title = {Competition of languages in the presence of a barrier},
author = {Christian Schulze and Dietrich Stauffer},
journal= {arXiv preprint arXiv:physics/0702031},
year = {2009}
}