Fig. 2
Value distribution of \(u_{1} ,u_{2}\) for experiment on the coexistence of two languages greatly different in strength. Sub-image a t = 100, sub-image b t = 300, sub-image c t = 500 and sub-image d t = 700. Sub-images a–d show the changes in the frequency of the two languages at different moments. With the advance of observed time moment, the originally more powerful language 1 becomes even more superior. The originally weaker language 2 co-exists with language 1 without dying out