There is no upper age limit for acquiring a new language and then continuing one's life with two or more languages.
获取一种新的语言能力且在日后的生活中使用多种语言的能力并没有年龄上限。
2
Nim went from a nice big bohemian, Upper West Side brownstone to a huge mansion in Riverdale that Columbia University owned in the Bronx, where he continues to be taught to use sign language.