By Number of Native Speakers:
* Mandarin Chinese is the most spoken language with around 1.1 billion native speakers.
By Total Number of Speakers (including non-native speakers):
* English is the most spoken language with an estimated 1.5 billion speakers, including native and non-native speakers.
By Number of Countries Where It's Official:
* English is the official language in over 60 countries, making it the clear winner in this category.
By Internet Usage:
* English is the dominant language on the internet, with over 50% of websites using it.
Therefore, depending on your definition of "most widely used," either Mandarin Chinese or English could be considered the most widely used language.