Perhaps you are thinking of the most spoken languages, or languages that are widely used for international communication. Some common examples include:
* English: Spoken by over 1.5 billion people worldwide, often used in business and international communication.
* Mandarin Chinese: Spoken by over 1 billion people, primarily in China.
* Hindi: Spoken by over 600 million people, primarily in India.
* Spanish: Spoken by over 500 million people, particularly in Latin America and Spain.
* Arabic: Spoken by over 370 million people, primarily in the Middle East and North Africa.
It's important to remember that there are many more languages spoken around the world, and it's fascinating to learn about the diversity of human communication.