English is spoken by approximately 375 million people as their first language. English is probably the third largest language by number of native speakers. However, when combining native and non-native speakers it is probably the most commonly spoken language in the world.
Croatian is the official language of Croatia. Croatian is spoken by 5.5 million people in total. Most of the Croatian speakers live Croatia. But the language is also used by a lot of people in Bosnia and Herzegovina, Serbia, Montenegro, Romania and Slovenia. Croatian is one of three official languages of Bosnia and Herzegovina.