* Defining "speaks": What counts as "speaking" a language? Is it fluency, basic understanding, or simply being exposed to the language?
* Data Collection Challenges: Accurately tracking language use across the globe is difficult. Census data might not be reliable or up-to-date.
* Multilingualism: Many people speak multiple languages. Including someone who speaks English, Spanish, and Portuguese in all three percentages would overestimate the total.
However, we can provide some general insights:
* English: Estimated to be spoken by over 1.5 billion people, making it the most spoken language in the world.
* Spanish: Estimated to be spoken by over 540 million people, making it the second most spoken language in the world.
* Portuguese: Estimated to be spoken by over 250 million people, making it the ninth most spoken language in the world.
Therefore, it's safe to say that a significant portion of the world's population speaks at least one of these languages. However, getting a precise percentage is challenging.