Learning a new language can help with your career prospects, your college education and experiences, travel, and personal enjoyment of the arts and culture.
More and more job advertisements are now specifying that they want second, third, and even fourth languages in some cases, and knowing more than one language opens up your prospects in a highly important way.
Overall there can be no denying that learning languages is wholly positive for individuals and society and that it is highly important to know more than one language. If more people were multilingual, the world would ultimately be a happier and more prosperous place.