A nice infographic by Alberto Lucas López:
There are at least 7,102 known languages alive in the world today. Twenty-three of these languages are a mother tongue for more than 50 million people. The 23 languages make up the native tongue of 4.1 billion people. We represent each language within black borders and then provide the numbers of native speakers (in millions) by country. The colour of these countries shows how languages have taken root in many different regions.
Obviously one can always quibble about the details, but at least Chinese is called a macrolanguage that “includes different languages and dialects” (though Arabic is treated as a single language), and it’s a striking way to present the information.
Addendum. Matt Zajechowski and a team at Olivet Nazarene University have developed an interactive graphic/map that covers the second most spoken languages around the world, which makes a nice companion to the posted one. Thanks, Matt!