Here's why:
* No Central Database: There is no global organization that keeps track of everyone's language skills.
* Language Proficiency: "Knowing" a language can be interpreted in various ways. Some may be fluent, while others might just understand basic phrases.
* Polyglots Are Rare: It's very rare to find individuals who are truly fluent in more than 10 languages.
It's safe to say that the number of people who speak more than 10 languages is extremely small. While there are some documented polyglots who claim fluency in a large number of languages, it's highly likely that the actual number of people with this level of proficiency is very low.