Is the ability to acquire language innate or learned?

I believe that the ability to acquire language is learned. There might be some genetic reasons that support the ability of innate. However, I had felt that people learned to acquire language every vacation since I studied abroad. If the ability to acquire language is innate, people wouldn't study any languages. however, people learned language to acquire othe language especially in my case. Every vacation, I went to academy to make my English level better. While I was learning English during a vacation, I realized that I am getting better. I think the reason is that a word "learn" works same as a word "repitation". When people acquire something new, they repeat the same thing. For instance, people repeat same strokes when they learn how to swim. I think basic idea on both learning swim and language are same. Therefore, leaning is the ability to acquire language.