Here's why:
* Usage:
* By native speakers: Mandarin Chinese has the most native speakers.
* By total speakers: English is the language spoken by the most people overall, including native and non-native speakers.
* In online content: English dominates the internet.
* Accessibility:
* Learning resources: English has the most learning resources available.
* Global communication: English is widely spoken and understood internationally, making it valuable for business and travel.
* Functionality:
* Technical fields: English is the primary language for scientific research, technology, and medicine.
* International organizations: English is the main working language of the United Nations and many other global organizations.
So, which language is "most usable" depends on your needs:
* For everyday communication: Mandarin or Hindi might be most useful if you live in a region where they are spoken.
* For international business: English is likely the most useful.
* For learning and research: English is again the dominant language.
It's important to note that language is a complex and dynamic system. The "usability" of a language is constantly changing, and what is most useful in one context may not be in another.