1. Indo-European: This family is spoken by roughly 3 billion people, making it the largest in the world. It includes languages like English, Spanish, Hindi, German, French, Russian, and many more.
2. Sino-Tibetan: This family is spoken by over 1.4 billion people, making it the second largest. It includes languages like Mandarin Chinese, Cantonese, Tibetan, and Burmese.