We are obliged to them because some of these languages have since vanished，as the people who spoke them died out or became assimilated and lost their native languages.

我们之所以感激他们（两位无驱），是因为在此之后，这些（土著）语言中有一些已经不复存在了，这是由于说这些语言的部族或是消亡了，或是被同化而丧失了自己的本族语言。

youdao

We are obliged to them because some of these languages have since vanished,as the peoples who spoke them died out or became assimilated and lost their native languages.

我们感激他们，因为在此之后，由于说这些语言的部族或是消亡了，或是被同化而丧失了自己的本族语言，因而这些语言中有一部分已经消失了。

youdao

We are obliged to them because some of these languages have since vanished， as the peoples who spoke them died out or became assimilated and lost their native languages.

我们之所以感激他们(两位先驱)是因为在此之后，这些(土著)语言中有些已经不复存在了，这是由于说这些语言的部族或是消亡了，或是被同化而丧失了自己的本族语言。

youdao

According to most historians, the Albanians, a Caucasian people first recorded by the Romans, simply disappeared around the 10th century and became assimilated with their neighbours.

ECONOMIST: Letter from Karabakh