Do any of you know how to add the Korean keyboard because my Duolingo levels are asking to type in Korean now, but I can't.
Press Windows-key and type 'add language', add Korean. The language at the top of the list will be your default.
You can press ALT+SHIFT anywhere to switch between keyboards. Your current selection is displayed in the system tray, near the clock. The Korean layout is actually Korean-English; after switching to it, you will need to press the RIGHT-ALT button to toggle between Kor/Eng.
If you're on a Windows computer, you can add the Korean keyboard by going to settings -> time and language -> region and language, then clicking on "Add a language" and find Korean/hangul (it might be written either way. Once you've added the keyboard, you can switch between typing in English characters or Korean characters by using the taskbar in the bottom left of your screen. Once you've added the Korean language to your language settings, a little ENG symbol should appear in your taskbar. If you click on it you should be able to select a symbol that looks like this: 한. Once you click on that symbol, a little A should appear just to the right of it (still in the taskbar). If you then click on the A, it should switch to a symbol that looks like this: 가. And then you should be able to type in Korean.
If you're on a phone, you should be able to also add Korean to your language settings. And then when it gives you the keyboard to type, click/hold (apple/android) where you usually would to get to the emojis, and then you should get the Korean keyboard (on apple, keep clicking until you get the keyboard; on android, click and hold the button you usually would to get an emoji, and then release when you're hovering over the Korean keyboard button.
(I don't know how to do it on an Apple laptop/computer, sorry) (If this was a little vague or if you still need a little help, just ask) (I hope this helps)