I believe that it's English because so much people use this language to communicate with other people that has a different kind of nationality. And it's considered as an official language to a lot of countries.
ex. USA and Canada
The mostly used Language is Chinese
English since it is the first or second language for most people.
English
Mandarin ChineseEnglish is second
Mandarin has the most number of native speakers, but English is the most widely used langague in the world.
C++ or Java probably
Mandarin has the most number of native speakers owing to the large population of China. English is the most used language in the world as its taught in almost all public schools as a second or third language. Also almost 50 countries have English as their lingua-franca.
English - by number of countries, Chinese by number of speakers.
English is the most commonly spoken language on the world. As a way, this is helpful when traveling around the world.
Mandarin Chinese is the most spoken language in the world with an estimated 845 million native speakers.
The most common official language in India is English, used for formal communication in all 28 states and all 7 union territories. English is important in the world because it is the most widely spoken language.
Mandarin Chinese is the most spoken language in the world with an estimated 845 million native speakers.