A study conducted at the University of British Columbia found that infants and four-month-olds can recognize and recognize other languages when speaking to them through their visual signals, depending on the shape and rhythm of the speaker's mouth, Another study found that children living in bilingual homes needed their brains to take a long time to pick up one of the two languages, compared with infants living in a single-language environment, so that the entry and acquisition of any other language would be easy to distinguish.
