Why English is called a library language?

English isn't typically referred to as a "library language" in the traditional sense.

It's possible you're thinking of the term "library language" being used in a specific context, such as:

* In the context of programming: "Library language" might be used to describe a language with a rich set of pre-built functions and modules ("libraries") that make programming easier and more efficient. While English isn't a programming language, it's the language used to describe and document these libraries, making it indirectly important in the development process.

* In the context of information access: English might be called a "library language" because it's the dominant language used in many libraries and online resources, making it easier to access information for English speakers.

However, it's more common to see English described as a global language, lingua franca, or international language due to its widespread use in communication, commerce, science, and culture.

Let me know if you can provide more context about where you encountered the term "library language," and I can help you understand its meaning better!