Yeah,I was looking at that map and noticed that it looked dodgy.Doesn't the Indonesian archipelago meant to have hundreds of living languages within it too? Here is a more plausible looking map:
The number of languages considered indigenous to each country that are still spoken there:
[T]he map presents a good picture of linguistic diversity. Papua New Guinea has nearly 10% (820) of the world's indigenous living languages, so that there are only an average of 7000 speakers per language living there. Indonesia (737), Nigeria (510), and India (415) also have a large number of native languages.
At the other end of the scale, Belarus, Maldives, DPR Korea and Holy See each have only one indigenous living language.