What makes you think it’s easier for a child? Have you ever spoken to a 6-year-old? They sound like idiots (only partially kidding, here). Children are bombarded with language throughout the day, everyday. They generally have at least one person talking near them and to them the majority of the time. They have people whose careers are centered around teaching them how to read, write, and speak. It still takes them over a decade to become adequate. If you had this as an adult, you could learn a foreign language much faster than most children learn their native language.
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