No Words Tab
I was wondering why there is no Words Tab that list the words that we've learnt and the strength of the each word in English -> Korean. But there is a words tab in English->Spanish. Am I the only one or did duolingo not yet introduced this feature in Korean?
Only the original courses that were developed by staff "back in the day" have a words tab.
Courses that were created 100% by volunteers do not.
There is a way to trick duo into giving you a word list for another course.
1). Open duolingo and select one of the original courses. (Spanish in your case.) This will give you the option to open the words page.
2). Open another tab in your browser and change to the course that does not have an official words page. (Korean for you.)
3.) Go back to the Spanish tab still sitting there in your browser, still not updated and unaware of the fact that you have switched to Korean. Click the words tab and duo will fill your Spanish words page with the words from the Korean course instead.
Edit: I never really use this trick since I don't care about the word list, but I managed to get my Japanese words listed just now so it seems to work.
Not that I'm aware of. There isn't any setting to change, or any petition to sign.
The only way I could imagine it being brought into other courses is if folks used it in the courses that have it AND if the data showed that the "Words" tab positively impacts learning and retention. Duolingo relies on data when they make their strategic decisions.