The most commonly spoken language in the world is English. With over 1.5 billion speakers, it serves as the dominant global lingua franca, used in international business, diplomacy, and communication. English's widespread use has been facilitated by historical factors, such as the British Empire's expansion and the global influence of the United States in the 20th century. Furthermore, English is the primary or secondary language for many countries, making it essential for travel and cultural exchange. Its role in technology, media, and education solidifies its status as a key language in today’s interconnected world.