Here is the second question for you guys! "What if you don't understand or speak any korean? Do they teach you when you become a trainee or you have to learn korean yourself?" 

Okay, so the issue of language comes up quite often in terms of foreigns hoping to be trainees. The main point is that: Yes, the companies will train you in whatever language they want you to learn, be it Korean, Chinese, Japanese, English, Thai, etc. etc. You don't necessarily need to learn or know Korean when you auditon, but it would certainly be an advantage. For example, Henry of SJ-M, Amber and Victoria of f(x), multiple members of EXO-M (I'm too lazy to type them all out) didn't know a squat of Korean when they first auditioned, so this shows that knowing Korean when you audition isn't necessarily a requirement. In ABC's K-pop Boot Camp, you can see John Seo, who hails from Chicago, USA, get Korean lessons even though his ethnicity is Korean. So, I would say this: you will get trained in literally all languages where its possible you or a group might promote in.

However, on the issue of debut/getting into a company, knowing Korean will be extremely important. That's how you get along with other trainees, that's how you understand criticism from the general public/from your trainers. I would recommend everyone to start learning how to understand Korean so your life when you first become a trainee becomes that much simpler.

You will also learn how to read/write in any of the languages as well. Don't think its as simple as just understanding -- it's not. Companies have to train you for fan signings, games during variety shows that involve reading, etc etc.

Just to summarize, it is okay to not know/understand Korean when you audition (but I think they would want you to speak at least 2 languages -- meaning they would want a language you have a decent grasp on like English and a language that you are well attuned to, let's say Chinese for Amber and Henry for those of you guys living in the US. Chinese hopefuls have a lot more leeway as many companies want to start debuting groups in China. However, it wouldn't hurt to know a couple of words in Korean). The companies will teach you Korean. However, you might be able to debut faster or trainee life will be easier, if you started to learn Korean by yourself on your own. If you do that, it would be a huge advantage at auditions. 

I hope I answered this question well enough -- if i didn't, drop a comment in the comment section below. Good luck to you!