What is a common misconception about language learning you'd like to correct?

I can honestly think of so many examples of this.

1. You must be in the country of the language to really learn anything
2. You can get very fluent in a month
3. That its a waste of time learning languages after a certain ages such as 40
4. That you can never get particularly fluent unless you are a child learner.
5. That you need to learn to read all the literature of a country to be fluent.
6. That certain dialects are better than others.
7. That certain languages are worth more than others.
8. That you have to be particularly gifted with languages to make any real progress.
9. That once you know all the vocab and grammar of a language, you speak it and understand the underlying culture.
10. That if you learn more than one language as a child you will be damaged and never reach fluency in either language.
11. That whatever you say in a foreign language is just a translation of your own language, you can´t change your basic identity.
12. That anyone can ever be 100 percent fluent in any language.
13. That you are not a real native speaker of a language unless you look like stereotypical image of someone from that enthnicity
14. That native speakers are the only ones who can teach you anything worthwhile in language learning.