Why is your total world population significantly lower than the actual population?

The total world population that Ethnologue reports is the sum of the total populations of L1 speakers of the living languages. Those population numbers come from a variety of sources and from significantly different points in time. In addition, the Ethnologue lacks population estimates for about 4% of the world's languages and also does not automatically extrapolate population estimates to the current year, but waits for reports from reliable sources. As a result our world population count varies considerably from current census estimates.

On what basis are the countries grouped into regions?

The division of the world into 5 major areas which are subdivided into 22 regions follows the groupings of countries used by the United Nations Statistics Division in its reporting. See:

Why are there some countries without a language map?

Some countries have no language map(s) for one or more of the following reasons:

1. All the languages are widespread throughout the whole country.

2. There is only one language spoken in the country.

3. The data available to us is not reliable enough to publish.

4. Map production is underway for the country but has not yet been completed.

Which countries have the most languages?

Papua New Guinea has the most languages, with 836 living languages.  Indonesia comes in second, with 706 living languages.  Third place goes to Nigeria, having 522 living languages.

What country has the most languages?

Papua New Guinea with 836 living languages

Can you send me more information about country X?

Browse the Country Indexes to find the languages in which you are interested, and follow the links to available publications.