Some people consider that it is a good idea to learn foreign language working in another country as an au pair. 
In my opinion, the best way to learn English is working an au pair. Firstly, when you work an au pair, you communicate with children and you can perfect your English faster because children are more friendly, open and sociable than adults. Moreover, If you are alone in another country you should be responsible and remember all the new words that you need to communicate with people. You have to improve you vocabulary every day. 
In the other hand, you can feel alone without your family and friends. Besides, you can meet a not good family. Members