Well, it sure ain't LibreLingo, but I'm not sure it's any worse than the average proprietary software these days.
Is there some specific aspect of it that's particularly bad?
Selfishly, I would prefer they expand existing courses I use to make them more complete and comprehensive.
For languages with a smaller user base, it would be awesome if there was an open source app similar to Duolingo that would allow for community courses to be built and maintained. Quick search found LibreLingo, which looks like it could become just that. So perhaps some folks here would be interested in actually building course material for their preferred languages (especially if it is their native language).
The part about not limiting yourself to Duolingo was mostly informed by someone describing their experience working on the Hungarian course, especially these parts
> The Duolingo course builder is a rather slick UI, but I found it brittle. Like many UIs, it does what it does, and then it stops. There's no direct access to the underlying database, meaning you can't do any kind of search on problem phrases for instance. You can't do any bulk updates of any kind. All you can do is navigate through the course structure to the sentence you want, and use a custom editor to make changes to it. Very clunky.
...
> I'd be happiest if the canonical course were actually defined in a document that had an independent existence from the live database entirely and could be version controlled. (Obviously multimedia resources would have to live outside that document, but you could have a descriptor for each one and use it within the course definition.)
> By all means provide a builder UI to smooth the process - but at volume, you'll want some way to just work on things in text or you'll end up buried in technical debt.
They wrote that as a reaction to the announcement for LibreLingo, which you might want to check out, too, although it looks like it's still in development.
But my takeaway is that whatever platform you're using to publish a language-learning course, you should keep a text file with your own copy of the content, so that you aren't limited to what that one platform lets you do.
I support it but good luck getting Duo to sign off on it. People have been waiting to create courses for years and still haven't gotten the chance.
In the mean time there's some alternative platforms for course creators. I'm interested in https://librelingo.app/ which is an open source project.
How do you learn Interslavic? Can you recommend me some materials?
See this German course: https://librelingo.app/course/german-from-english/
This course is not really being worked on currently, but it shows that it's completely different from the Spanish course
Kaj ĉu la kursokreantoj daŭre posedas ilian laboron? Aŭ ĉu estas nur Duolingo?
Ekzemple ĉu la volontuloj kiuj kreis kurson povos kopii ĝin al tiu ĉi projekto kiam ĝi pretos?
Duolingo tre bone taŭgas por varbi por Esperanto. Tiam mi suptenos la germana kurso se ĝi iam venos. Sed ankoraŭ mi ne vere ŝatas la firmao kaj mi esperas ke la Librelingo-projekto kreskos: https://librelingo.app/