The study cites several reasons for the disappearance of languages, ranging from repressive government policies and assimilation to economic pressures, migratory trends, disease and natural disasters.

• "论文列举了一些造成语言消亡的原因，包括政府的压制政策、同化作用、经济压力、移民风潮、疾病以及自然灾害等等。