Final answer:
The most commonly spoken languages are Sinitic (including Mandarin), English, and Indo-Aryan and Dravidian languages.
Step-by-step explanation:
The languages most commonly spoken belong to the Sinitic branch of the Sino-Tibetan language family, which contains Mandarin (spoken by 70 percent of the population).
In addition, the English language is spoken by the vast majority of the population and has the highest number of speakers worldwide.
India has the world's second highest number of languages, with the major ones being the Indo-Aryan languages spoken by 76.5 percent of Indians and the Dravidian languages spoken by 20.5 percent of Indians.