Final answer:
Children start saying 2-4 words around the age of 1 year and expand their vocabulary as they approach two years old. The weaning process from the bottle typically begins before the global average in America, with an average starting age of nine months.
Step-by-step explanation:
Language Development and Weaning Age
Children typically begin saying 2-4 words around 12 months old. During this period, they transition from the "one word" stage of language development into combining more words, expressing not only identification but also requests. By the age of 2, their vocabulary can expand to about 50 words, and they begin to understand many more. Around these ages, children also begin the process of weaning from the bottle or breastfeeding. Although the global mean weaning age reported by the La Leche League International is four to five years, in America, it's much sooner, with a mean weaning age of nine months, as indicated by a survey of U.S. mothers. This is a significant indication that the weaning process in the United States tends to start much earlier than the global average.