The internal factors is the important composition that resulted the learner to success in learning a second language .The individual language learner bring the particular learning situation. Internal factors that have an effect on learner are age, personality, motivation, experience and cognition. The first one, Age: children can beginning to learn a second language when they was young and it's better than older learner because learned that is naturally and they have skill in their own language and seem to be in the best position to acquire a second language efficiently . The older can be success in leaning too but they must to try. The second is Personality: for learning english you must to have ability to speak and more outgoing. Don't be shy but try to train in every time that you can. Next, Motivation: if you like something in english such as super star, musical or the culture. Its motivation or inspirations that make you want to learning in english. So that Experience: are important for learners who have acquired general knowledge and experience are in a stronger position to develop english language .For example: you ever have boy/girlfriend that you use english for chat or communicate, or you ever travel in England and the last is Cognition: some learner who has great cognitive abilities will make the faster than other.