Abstract This work addresses from the perspective of evolutionary pressure, delicate issue mechanisms and causes that are behind emergence faculty language among early Homo sapiens ancestors. It mainly focuses on motives or driving forces first units language. The latter defined in this paper, as vocal signals convey information meanings go far beyond usual repertoire non-human primates. They e...

one of the most controversial and unresolved questions in bilingual first language acquisition (henceforth bfla) is whether bilingual children develop one mixed or two independent linguistic systems. many scholars in the lield of bfla arc in tavor of the one-system hypothesis (leopold 1970; swain and wesche, 1975; volterra and tacschner, j 987; grosjean, 1982; tacschncr, 1983: mclaughlin, 1984:...