Generally speaking, human history has witnessed a perpetual process of language evolution or devolution through time.In the past, other languages like Arabic, Roman, French and German enjoyed their own periods of language spread and global popularity.Currently however, English has gained itself a charismatic status so that all nations on the globe tend to use English as the language of science.It is mainly realized that there are numerous reasons why languages pass through the processes of distinction or extinction according to the special roles they play in human societies. The following links can hopefully provide you with the bibliography you are looking for.