INTERNATIONAL JOURNAL OF MODERN PHYSICS C, cilt.18, sa.6, ss.1061-1070, 2007 (SCI-Expanded)
A quantitative method is suggested, where meanings of words, and grammatic rules about these, of a vocabulary are represented by real numbers. People meet randomly, and average their vocabularies if they are equal; otherwise they either copy from higher hierarchy or stay idle. The presence of teachers broadcasting the same (but arbitrarily chosen) vocabulary leads the language formations to converge more quickly.