At what age would a pediatrician become concerned if a child was not talking at all?

Name: At what age would a pediatrician become concerned if a child was not talking at all?
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By 2 years, children are typically expected to have a vocabulary of at least 50 words and start combining words into simple sentences. Lack of speech by this age may indicate a developmental delay or disorder, prompting concern from a pediatrician.

At What Age Would a Pediatrician Become Concerned If a Child