i am going to learn chinese language here but ....
i am going to learn chinese language here but there is not any course about this i don't know for what ? chinese language is a popular language in world . . . why duolingo ?
Lots of people are very interested in Mandarin or other Chinese languages and several other Asian languages. If it were just a matter of demand (which is high - there are posts like this one almost every day), appropriateness of the language, or even developers available to help build the course, I think it would probably be well along by now.
Unfortunately, Mandarin, as well as Japanese and several other languages whose written language is based on ideograms, are currently technically impossible for DL to offer to speakers of other languages.
If you know Chinese at least a little and would like to learn more, you can try seeing if there is an English for X-Speakers course (as there currently is with Chinese - I don't know which Chinese language, but I'm guessing Mandarin - in beta stages but with many, many users already), and you can identify yourself as a X-speaker wanting to study English for that language. Obviously, you'll need to be able to at least read the instructions. so it's not a beginner's course.
People have also linked to HelloChinese, which is an Android app for learning Chinese. I haven't used it so I can't tell you anything about it, except that some people on DL have recommended it.
To answer your question, the software that Duolingo runs on now is simply impossible to implement the Chinese characters, along with Japanese. I hoped I helped.
I don't think that Korean is impossible to implement... After all, it has an alphabet
And for Chinese: You can download a Chinese keyboard, just as in Ukrainian
I don't know what to say about Japanese, because I don't know how its writing system works
But they're still hard to implement in Duolingo
Downloading the keyboard makes it possible for the user to enter Chinese characters. It doesn't solve the technical problems that make it impossible for DL to build lessons for the language.
And no, I haven't heard that the same problem applies to Korean.
This question pops up several times a day, every day. Can the mods make a sticky note of the explanation?
I have asked so many people for this. Seriously. I asked one of the course developers for the English(Japanese) course, who said it was a good idea and then didn't get back to me. I emailed firstname.lastname@example.org, no answer. I asked three or four people if it might be possible to get at least an official wiki statement about it that we could link people to, and was told I was welcome to add things to the wiki if I wanted, which completely misses the 'official statement' part of the need. I asked a mod who seemed like a good choice, and haven't heard back yet....
If you have any other ideas, please try them or toss them my way. People often get seriously downvoted for just posting a request, only because they don't realize that it's been asked so many times before that people are getting worn down responding each time, and it's not fair to the OPs.
there's an app called ChineseSkill on the AppStore. the people who made it made it because they couldn't wait for it to be put on Duolingo. The app is so much like duolingo. You should try it.