Adults learn language to fluency nearly as well as children: study

(Image from original paper)However, looking more closely at the data for the students who started learning after the age of 20, there are a lot of late learners who outperformed many native English speakers. On average less likely, certainly, but there are thousands of people who took this quiz, got a score in the range that a native speaker would, and started learning the language after the age of 20. The top quartile of results of learners who started after the age of 20, by number of years of exposure, showing that at around 8–10 years of exposure, many learners who started well into adulthood do just as well as many native speakers.

Source: medium.com