Why do many people think learning more than one language gives one an advantage over others? Professionals who know other languages are called on to travel and exchange information with people in other countries throughout their careers. Knowing more than one language enhances opportunities in government, business, medicine and health care, law enforcement, teaching, technology, the military communications, industry, social service, and marketing. An employer will see you as a bridge to new clients or customers if ou know a second language yProfessionals who know other languages are called on to travel and exchange information with people in other countries throughout their careers. Knowing more than one language enhances opportunities in government, business, medicine and health care, law enforcement, teaching, technology, the military, communications, industry, social service, and marketing. An employer will see you as a bridge to new clients or customers if you know a second language. Why do many people think learning more than one language gives one an advantage over others?