* Land mass doesn't directly relate to language distribution. A language can be spoken in a vast geographical area with sparse population, or in a smaller area with a dense population.
* Language boundaries are often complex and fluid. Languages can have multiple dialects, and there are often transitional zones where languages blend.
* "Most spoken" can be interpreted in different ways. Do we mean by native speakers, total speakers, or by the area covered by the language?
That said, here are some contenders if we consider native speakers and a rough approximation of land mass covered:
* Mandarin Chinese: Spoken across a vast area of China, it likely has the most native speakers within a single landmass.
* Spanish: Spoken in many countries across the Americas, including some large ones like Mexico and Argentina.
* Hindi: Spoken primarily in India, which is a very large country.
* Arabic: Spoken in many countries across North Africa and the Middle East, including vast deserts.
Without a more specific definition of "most spoken" and "land mass," it's difficult to definitively rank languages.