When does the window of opportunity for learning language skills begin to close?

The window of opportunity for learning language skills traditionally is believed to begin closing around 5 years old. This period is crucial because during early childhood, particularly in the first few years of life, children are especially adept at acquiring language. They can learn new vocabulary, understand grammar, and develop pronunciation skills more naturally and effortlessly in this sensitive period.

After about the age of 5, although children can still learn language, they may find it more challenging to achieve native-like proficiency. Research indicates that beyond this age, the ability to learn additional languages or nuances of language becomes less intuitive and may require more formalized teaching methods. As such, early childhood is vital for the foundational development of language skills, which is why the window is considered to close around this age.