Modelling bilingualism in language competition: the effects of complex social structure

In the general context of dynamics of social consensus, we study an agent based model for the competition between two socially equivalent languages, addressing the role of bilingualism and social structure. In a regular network, we study the formation of linguistic domains and their interaction across the boundaries. We analyze also the dynamics on a small world network and on a network with community structure. In all cases, a final scenario of dominance of one language and extinction of the other is obtained. In comparison with the regular network, smaller times for extinction are found in the small world network. In the network with communities instead, the average time for extinction is not representative of the dynamics and metastable states are observed at all time scales.