Question

How many languages are there in the whole of world?

Answer 1

There are approximately 6,500 world languages, with up to 2,000 of them with fewer than 1,000 speakers.  The exact number of languages is unknown, as many un-contacted civilizations in the Amazon and other climates have multiple different languages, and the exact number is unknown.  Also, even in Africa, sometimes every village has a different language.

Answer 2

6,500 languages in the world, however some have less than 1k speakers.