( Have You Ever Consider Other Languages?) According to a study, the best age to learn a new language is before age 10. The study found children are able to absorb new languages faster, than adults until the age of 18 or 19 . However, it is nearly impossible for people to achieve proficiency similar that of native speakers, unless they start learning a language by the age of 10. Yet, language experts of Harvard & MIT experts say that you're never too old to learn a new language. While it can be more difficult to learn a new language as you get older, children and adults learn new languages in different ways.