Microscopic Abrams-Strogatz model of language competition
  The differential equations of Abrams and Strogatz for the competition between two languages are compared with agent-based Monte Carlo simulations for fully connected networks as well as for lattices in one, two and three dimensions, with up to 10^9 agents. 
Dietrich Stauffer, Xavier Castello, Victor M. Eguiluz, and Maxi San   Miguel