How many people can speak all of the human languages?

There is no one person who can speak all of the human languages.

Here's why:

* The sheer number of languages: There are thousands of languages spoken around the world, with estimates ranging from 6,000 to 7,000.

* Language acquisition takes time and dedication: Learning a single language fluently can take years, and mastering multiple languages is a significant undertaking.

* Some languages are very rare and isolated: Many languages are spoken by small communities, making them difficult to learn due to limited resources and exposure.

While some polyglots can speak dozens of languages, achieving fluency in all languages is a practical impossibility.