  A simple spatial computer simulation model was recently introduced to study
the evolution of the linguistic diversity. The model considers processes of
selective geographic colonization, linguistic anomalous diffusion and mutation.
In the approach, we ascribe to each language a fitness function which depends
on the number of people that speak that language. Here we extend the
aforementioned model to examine the role of saturation of the fitness on the
language dynamics. We found that the dependence of the linguistic diversity on
the area after colonization displays a power law regime with a nontrivial
exponent in very good agreement with the measured exponent associated with the
actual distribution of languages on the Earth.
