It's important to note that "most spoken" can be interpreted in different ways:
* Native speakers: Mandarin Chinese has the largest number of native speakers, with over 939 million people worldwide.
* Total speakers: If you include second language speakers, English might be considered the most spoken language, with over 1.5 billion speakers.
So, depending on the definition, either Mandarin Chinese or English could be considered the most spoken language in the world.