你知道世界上有多少种语言吗？

Do you know how many languages there are in the world?

youdao

没有人知道世界上有多少种语言。

Nobody knows how many different languages there are in the world.

youdao

没有人确切地知道世界上有多少种语言，部分原因是在一种语言和亚语言之间作出区分存在困难。

Nobody knows exactly how many languages there are in the world, partly because of the difficulty of distinguishing between a language and a sub-language (or dialects within it).

youdao