Research on bilingualism has shown that balanced proficiency in two languages may result in delayed language development, learning problems, and lower intelligence.

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Research on bilingualism actually shows that balanced proficiency in two languages has cognitive benefits, such as enhanced executive functioning, and does not result in delayed language development, learning problems, or lower intelligence. However, bilingualism can be a risk factor for language delay if one or both languages are not supported adequately.

Research on Bilingualism Has Shown That Balanced Proficiency in Two