Arabic is arguably the most international language largely after English and French as far as it is the language of Islam. It is spoken as a second language by hundreds of million people around the world, and is used as the primary language in twenty countries.
There are almost 400 million native speakers in the world. It is one of the six official languages of the United Nations, and an official language used by the European Union, the Organization of American States, and the Union of South American Nations.
It only has about 500 million native speakers there are almost 2 billion people in the world that speak English on a regular basis. English is probably the third largest language by the number of native speakers.