The most commonly used language in the world is Mandarin. Over one billion people speak Mandarin as their mother tongue.
The next most common languages are:
These are the most important languages in terms of total population, but the world has 191 countries and over 6800 languages. Many of those languages are limited to very small geographic areas or small ethnic populations, but they’re all fully evolved, complex, culturally rich linguistic systems.
Important languages in business and for Internet service providers
The languages that are important in international business, as an Internet service provider, depend largely on the specific business you are in, the service you provide, and where you are focusing your marketing efforts. In general, we can say that the following languages are key for most international service providers:
What makes a language important to business? It’s partly a matter of target population, and it’s partly the affluence of each population and their willingness to do business outside their local communities or nations.
Important languages in science and technology
The languages that are important in the fields of science and technology are arguably the following:
What makes a language important to science and technology? It’s primarily the amount of science being done in a given linguistic group, and partly the accessibility of that language to the larger scientific and technical community (either through multi-lingualism or through machine-mediated translation).