Everyone should learn a foreign language in addition to English or national language because in the present, language is important for getting a better job. There are many companies want employees who can speak many language. Language able to learn other culture because sometimes learning a foreign language helps you own language and culture better through comparison. And the last, language has disadvantage such as slower to learn languages even though bilingual children are better at multi tasking, the study also found that bilinguals are slower to acquire vocabulary than are monolinguals.