Ch.5.2 Distribution of language
Seven language families are used by most of the world
Two largest language families.
Hong Kong, China, has street signs in both Chines and in English
Language families.
Afro-Asiatic, Altaic, Austro-Asiatic, Austronesian, Dravidian, Indo-European, Japanese, Korean, Niger-Congo, Niger-Sahara, Quenchuan, Sino-Tibetan, Uralic.