People often ask which is the most difficult language to learn, and it is not easy to answer because there are many factors to take 1 consideration.
A native speaker of Spanish, for example, will find Portuguese much easier to learn than a native speaker of Chinese, because Portuguese is very similar 2 Spanish, so first language can affect learning a second language. The greater the differences 3 the second language and our first, the harder it will be 4 most people to learn.
Teachers and the circumstances 5 which the language is learned also play an important role, as well as each learner's motivation for learning. If people learn a language because they need to use it professionally, they often learn it faster than people studying a language that has no direct use in their life.