instruction: What language should I learn?
output: If you are interested in verbal languages, the most popular languages are English, Mandarin, Hindi, and Spanish. Learning one of these languages will allow you to communicate with over half a billion people! However, it also depends on your interests, such as travel interests or friends, who might speak these languages. If you are interested in non-verbal languages, American Sign Language (ASL) is the most popular non-verbal language.