One thing to be aware of is the individual ability when it comes to acquiring language skills varies, a lot! The same applies to any skill really. We all know

One thing to be aware of is the individual ability when it comes to acquiring language skills varies, a lot! The same applies to any skill really. We all know self taught programmers who are great. We all know top school programmers who suck. If you have a knack for it, age won't be much of an issue. If you don't, it'll be hard regardless. Children don't have a choice in the matter so they all learn. Once you have a choice, most will opt out of struggling to improve their language skills to remove accents, etc.