Question

At which age children learn a new language fluently

Answer 1

Explanation:

To become completely fluent, however, learning should start before the age of 10. ... Once they do, they may no longer have the time, opportunity or learning environment to study a second language like they did when they were younger.If you haven't begun the second language in the first year, it's best to wait until your child is about 2-1/2 -- or until after he has undergone a "vocabulary explosion" in his first language, which generally begins at 18 to 20 months.