The world is filled with many languages spoken globally, it is not confined to just one language, each country has its own national language.
Amongst these it is hard to figure out which languages are commonly spoken, but across the time and continents there are some languages which are much used than the others.
The first would be English, it is commonly spoken worldwide, and also many countries first language taught in school and used as a medium of learning in many countries too. About 1.5 billion people speak English.
The second is Mandarin Chinese spoken by 1.3 billion people worldwide. Spoken in major countries like Malaysia, Singapore, China, Taiwan.
Spanish comes third in a line spoken by about 661 Million people globally, spoken in countries like Argentina, Chile, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, El Salvador, Equatorial Guinea, Guatemala, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, Sahrawi Arab Democratic Republic, Spain, Uruguay, Venezuela, United States.