Here's why:
* No official census: There is no official global census that specifically tracks Bhojpuri speakers.
* Linguistic classification: Bhojpuri is often considered a dialect of Hindi, and some speakers may identify as Hindi speakers rather than Bhojpuri speakers.
* Regional variations: Bhojpuri is spoken in various regions across India, Nepal, and even some parts of the Caribbean. Each region may have its own variations of the language.
However, estimates suggest that Bhojpuri is spoken by around 50-60 million people. This makes it one of the most spoken languages in India and globally.
It's important to note that these figures are approximate and vary depending on the source.