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Not sure if anyone else is having this issue but... I am doing the reverse tree English-Chinese and a few weeks ago on my laptop that course went away. It's still on my tablet, but it can't be found on my laptop. I like doing a language both ways because I find it useful. So I have Chinese - English and also English - Chinese, same with Spanish and Russian. Not sure why this has happened or how to get it back. Anyone else had this issue? How did you fix it?? Did you fix it????
Thanks
Thomas.Heiss
The EN<-ZH reverse course is here: https://www.duolingo.com/enroll/en/zh/Learn-English
On the www.duolingo.com/courses list you just have to switch the base language in the select box to get all options shown.
If any XPs are registered it should show up straight away in the list when you click the language flag in the header.
Native | 
Upper-B2 (BritishCouncil) | 
L25 (Duo) / A2 (6+y, McGraw-Hill) - Learning (Busuu): 
(A1 McGraw-Hill) | 
(interm.)
Thomas:
I don't think you understood, I had been in that course and then for whatever reason it dropped off my list of courses. If I go back now and add it will I lose all the progress I've made and have to begin again? I could add it, I know how to do that, but how can I get it back without losing all my prior progress? That is my question, sorry if I wasn't clear.
Thomas.HeissOh, I see.
Yes, it's gone for this "lrai" account 
Neither Duome nor Duolingo show me that you had it with any former XP / progress.
Maybe someone has broken into your account, hit the remove course button...
Or maybe you tried to delete another course in the last weeks / months and the dialogue also removed your EN<-ZH reverse course?!?
I know for sure that it's tricky and sometimes the dialogue doesn't refresh fast enough.
So when clicking on the button a second time it might kill another course.
It happened to me once that I reset my German reverse tree by accident while I only wanted to reset Spanish.
It asked me, I confirmed. In the end it was the wrong one.
Or another idea:
You had it added on another 2nd/3rd Duolingo account, not this "lrai" account?!
Native | Upper-B2 (BritishCouncil) | L25 (Duo) / A2 (6+y, McGraw-Hill) - Learning (Busuu): (A1 McGraw-Hill) | (interm.)
Thomas.HeissIf the course would still be in your list with some XPs then clicking on the enroll/learn button won't overwrite it.
But in this case, as it's totally gone for this account, it would start again from scratch.
Native | Upper-B2 (BritishCouncil) | L25 (Duo) / A2 (6+y, McGraw-Hill) - Learning (Busuu): (A1 McGraw-Hill) | (interm.)
Thomas.HeissSadly to say DL staff didn't write me back several years ago.
I don't have the strong impression that someone is able to recover a deleted single course from a backup server, not even if you noticed it within 1-2 days.
I wasn't able to regain the strength to restart my reverse DE-EN tree and to re-test out where I had left off.
You could open a ticket and try your luck, but somewhere it's written that "gone is gone".
I offered them a PayPal donation. I may have enrolled into Duolingo Plus for one year.
Doesn't seem anything was possible as they've NEVER reacted.
In this AI century you probably know that your chances are much less that someone human reads your ticket, sadly to say.
Maybe try contacting a DL staff member on the /r/Duolingo Reddit channel directly once you've opened a ticket_id.
But without telling them precisely when this has exactly happened that 1-n courses are suddenly gone from the learning list they wouldn't have a clue to what date to rollback some profile/data changes.
And the backup on a second server might not do an incremental backup for 30-90 days.
After x days they might overwrite some old data.
As I said, I immediately contacted them the same day; not any chance.
Your Super subscription might not be enough that someone has to dig through file based backups trying to recover any lost DB entries; it's a big job, consuming some man power hours.
If I shall guess: There's no admin tool supporting this automatically.
They didn't think so far, else there would be an automatic restore button, asking you for which date and language pair in the last 10-30 days.
But if you feel any better when you have at least asked them to do this, go for it.
Native | Upper-B2 (BritishCouncil) | L25 (Duo) / A2 (6+y, McGraw-Hill) - Learning (Busuu): (A1 McGraw-Hill) | (interm.)
Thomas.Heisslrai wrote: Thu Apr 09, 2026 10:21 pmSo I have Chinese - English and also English - Chinese, same with Spanish and Russian.
What's your DL username / profile?
I don't find any of the two Chinese in your "lrai" username/profile!
Native | Upper-B2 (BritishCouncil) | L25 (Duo) / A2 (6+y, McGraw-Hill) - Learning (Busuu): (A1 McGraw-Hill) | (interm.)
Thomas.HeissI don't see any Russian course.
Must be a different username/profile then.
Native | Upper-B2 (BritishCouncil) | L25 (Duo) / A2 (6+y, McGraw-Hill) - Learning (Busuu): (A1 McGraw-Hill) | (interm.)
The name is PerfectEnglish554596 not Lrai. Thanks for the info. I had hoped that because it's still on my tablet that maybe it could be recovered for the laptop, now the question is if I restart this on my laptop will it change my tablet?
Thomas.HeissDo you use a different account on your tablet?
I can't see anything because your profile is set to private mode.
However, when I go to www.duolingo.com/courses all my already started learning languages (with progress) have a green tick.
And when I switch between the EN/DE/PT languages and I check my DE<-PT reverse tree which I haven't touched for a while it also shows the green tick.
When there's a green tick:
The enroll link will only switch to this ACTIVE course.
But ALL my languages (with some XP progress) are clearly listed as shortcuts under the language flag in the web header menu when I click on the flag.
Have you set your account to public and checked what Duome sees when you refresh your Duome profile?
Native | Upper-B2 (BritishCouncil) | L25 (Duo) / A2 (6+y, McGraw-Hill) - Learning (Busuu): (A1 McGraw-Hill) | (interm.)
I went public and did a check and the course is there but when I click on it (when I click on any of the English-whatever) it tells me nothing. So I have no idea. The tablet is under the same account as my laptop, and as I said before the laptop, no course, the tablet has the course...so I could try to add it again to my laptop but not sure how that will affect the tablet. If anyone knows please enlighten me, LOL BTW I did not delete it from my laptop, even by accident, it just disappeared a few weeks back. Not sure but gremlins must be at work.
Thomas.HeissGoing public wasn't successful.
I guess accounts registered in China are more restricted.
Back to the question if you actually see a green tick at this Url https://www.duolingo.com/courses/zh for the shown English course (in that area top right where the bigger flag is) with Chinese as the base or not.
Native | Upper-B2 (BritishCouncil) | L25 (Duo) / A2 (6+y, McGraw-Hill) - Learning (Busuu): (A1 McGraw-Hill) | (interm.)
Okay I went to the link and all the courses I have signed up for have green check marks, but I still don't have the Chinese-English course on my account, it's still a no show. As for China, it's not that, I don't stay public longer than I must. So I go public long enough to go on Duome, then I switch back. That is why you can't see me. Sorry for the confusion. I just guess at this point I will have to either live with not having that course on my laptop account and just keep it going on my tablet or risk it and try to re-add it and see what happens to both.
Thomas.HeissPersonally I wouldn't re-add it on the Web if the green tick is not already there.
See what DL staff tells you when you show the screenshots to them with a clear detail description.
Maybe some data got corrupted on the account and the learning state is wrong.
Or maybe it has something to do with the fact that most tree data is gone and DL staff is touching the "extended user profile" and their old APIs.
It's not that nice that we can't do any manual account data backups, knowing that we can't do a restore from any cloned (backup) server from 1-n days ago.
You may not get any direct feedback but who knows how many other accounts got affected after they touched/corrupted their old code.
As I said: After 7-14 days of no resolution you can try escalating the ticket by contacting DL staff with the ticket_id on the Duolingo Subbredit.
Only do what they tell you (but don't listen to an unhelpful AI response) to play safe.
Native | Upper-B2 (BritishCouncil) | L25 (Duo) / A2 (6+y, McGraw-Hill) - Learning (Busuu): (A1 McGraw-Hill) | (interm.)
Thomas:
As always thanks, so for now I will keep the tablet going with that course and just live without it on my laptop...seems like the only solution
Thomas.HeissA reverse course makes more sense with typing and less word banks.
I still haven't figured out a way to enable all the TTS audio.
On Android the "Select to Speak" Accessibility feature works for some.
I believe I found a userscript 1-2 weeks ago but it didn't work on Firefox Nightly@Android.
It's possible to install the "Typelingo" extension also on Android but then you're in the Web territory.
I guess with Asian languages I would tend to rely on the smartphone because of the on-screen keyboard layout and auto Hanzi suggestions for the typed Pinyin input.
A tablet is a nightmare with one finger typing.
Or do you use it in landscape mode with a hardware keyboard?
Native | Upper-B2 (BritishCouncil) | L25 (Duo) / A2 (6+y, McGraw-Hill) - Learning (Busuu): (A1 McGraw-Hill) | (interm.)
I do use it in landscape and I don't find typing to be an issue. The tablet is good for some things and my laptop is still best for word processing so having both is my solution for my particular needs. I find the tablet is easier for me when it comes to the hanzi, I can use the touch screen because my laptop doesn't have a touch screen and the mouse pad is a pain.
