单词parent-language
网络: 母语；语言的母语；原始语
I have had no problem connecting with the children even with the parent language barrier.
所以尽管存在着母语的壁垒，我们也能交流得不错。
A systematic study revealed that many modern languages descended from a common parent language, lost to us because nothing was written down.
系统的研究显示，许多现代语言起源于一个共同的母语，但由于没有文字记载，该母语已经失传。
the Indo-European parent language. English was first spoken by the Anglo-Saxons who invaded England in the fifth century.
英语最初是在公元五世纪入侵英格兰的盎格鲁--萨克逊人使用的。
Identifying similar words, linguists have come up with what they call an indo-european parent language, spoken until 3500 to 2000 B.
语言学家鉴定了相似文字，发现他们所称的印欧母语一直使用到公元前3500至2000年。
Most languages derive from one parent language. Mednyj Aleut has two parents.
绝大多数语言只源自一种父系语言，而MednyjAleut却有两个源头。
The Single Parent Language of All Mankind: Its Current Research
人类原始母语探源研究与现状