Because the environment of intercourse become narrow and live together with the ethnics of me population , the minority languages such a o - du , bo - y , co - lao , a - lian and ma - liang in vietnam axe vanishing gradually 摘要由于交際環境變小、與其它人口多的民族雜居等原因,越南的爾都、布依、仡佬、阿連和馬良等少數民族的語言正在出現逐漸消亡的危機。