The different between learn first language and second language and how is it difficult. First the reason make the first language more easier from learn second language, you can't explain what do you want, so you need to talk. Also it's more easier to  remember the words you learn it from any where. It's make it hard also, it's hard to find some one from the language you want to learn it to speak with him in any time. Sometimes you be afraid to say some thing wrong so you never talk. Also for me it's very difficult to learn second language English and my first language it's very different from the English, for example in Arabic we writ from the right to the left in English from the left to the right. And the lyrics it's not the sim. In concluding some people they cannot learn second language it's more difficult to them, I think it's up to the brain.