INFANT LANGUAGE ACQUISITION

Linguists have identified that the world's languages contain 558 consonants, 260 vowels and 51 diphthongs. Infants can distinguish all 869 phonemes up to the age of about six to eight months. After that, the brain sorts all the sounds of speech into the much smaller subset of phonetic categories of its native language. American English only uses 52 phonemes, while the Kalahari Desert language has the world's record with 141.