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 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.