So I ended up making two accounts using two separate emails on accident, and now I'd rather just use the one with the email I use most. I deactivated the other account, but I can't change the email on this account to that of the other. Thoughts?
Duolingo really needs a way to fully delete your account. What I would recommend is that you reactivate your other account temporarily, change the email to a random email (Duo doesn't have any verification checks, so that shouldn't compromise any personal info) . You can then deactivate that account again, go to the account which you'll be using to study, and the email address will now be free. Hope this helps!
You should be able to if you go into settings - account. From there, change your email and then press 'save changes'