Here's why:
* Native Speakers: It has the highest number of native speakers, with over 939 million people speaking it as their first language.
* Total Speakers: Including second language speakers, the total number of Mandarin speakers worldwide is estimated to be over 1.1 billion.
It's important to note that while Mandarin Chinese has the most speakers, it's not always the most widely used language in terms of global communication. English is the most widely spoken language in terms of the number of countries where it is an official language and the number of people who use it as a second language.