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Development

During the early period of rapid cognitive development in a child's life, it is much easier to develop and master foreign skills such as learning a new (or first) language. Verbal cues are processed and silently learned in preparation for the day the vocal system is developed enough to speak its first words (usually around 12 months). Before infants can identify words, they just hear "sounds" that they come to recognize. Eventually neural pathways are established in the brain that link each sound with a meaning. The more frequently a word is heard, the more its connection is solidified and the same goes for accents. There is no "standard" accent for the child to practice; as far as they are concerned, the accent they hear from their parents is not the "right" way but the only way. Eventually children graduate from the conscious act of recalling each word, and it becomes natural, like breathing. As children grow up, they learn vocabulary of the language they are immersed in, whether assisted by parents or not. However, their first few encounters with words determine the way they will pronounce them for the rest of their lives. This is how accents are cultivated in groups as small as towns and as large as countries; it is a compounding effect. Though it is possible to develop a new accent or lose an old one, it is difficult because the neural pathways created when learning the language were developed with the "original" pronunciations.

Children are able to take on accents relatively quickly. Children of immigrant families, for example, generally have a pronunciation more similar to people native to where they live compared to their parents, but both children and parents may have an accent noticeably differing from local people. Accents seem to remain relatively malleable until a person's early twenties, after which a person's accent seems to become more entrenched.

Nonetheless, accents are not fixed even in adulthood. An acoustic analysis by Jonathan Harrington of Elizabeth II 's Royal Christmas Messages revealed that the speech patterns of even so conservative a figure as a monarch can continue to change over her lifetime.