There should be Japanese
Out of all languages I would love to learn Japanese, but I know it could be hard for duolingo because they use different characters and not the alphabet like english. Maybe have it so you use english letters to learn how to speak and understand then go through writing it...?
I think Duo will add it to the incubator after the Japanese to English has been released as it is still in beta. I would agree about the writing. However there is a way to type in English (romaji) and have it come up in Japanese. I use the Microsoft IME as it is easy to switch between the different inputs but i think it would be too much for duo to ask people to download a software to do a course. I am intrigued how they will do it...
I agree, I would love to see Japanese added to the incubator. I don't think the different characters would be an issue, as the characters are in the app, if you get my meaning. The only issue is with writing, but you can get around it. I actually have a japanese keyboard on my phone because I changed the language on my phone to japanese once, and the keyboard remained! Using english letters to mimic the japanese (or romaji) isn't good to use all the time, possibly to begin with otherwise you might get totally confused..
There was a whole team that developed English for japanese speakers, surely the same team could produce Japanese for english speakers. I've been studying japanese for over a year now, so could contribute to the early stages (although I have no idea how it works for a language to enter the incubator) EDIT: just read into it and you must be bilingual (dammit!) but then I read on a thread that Duolingo were trying to get ways for users to be able to contribute to new languages, nothing so far
In the English for Japanese speakers course, they don't address the different alphabet at all. If and when they make a reverse course, the writing will be a challenge. Perhaps they will have the first few lessons in romaji so as not to scare people off, and then teach kana. The kanji will be pretty annoying, too, but I'm sure they will find a way around it. Maybe they could have two levels of hover-hints for kanji--one for reading, and then if you are still confused, you can check the meaning. In any case, you need the reading; that is one problem with the English for Japanese speakers course, that they expect you to know the readings, but if you speak English, that makes it much more difficult. They could of course expect you to know the kana, and only teach kanji, but that doesn't seem very friendly.
Lets not forget the 4 writing systems that they MAY want to include in to that course, and it would take forever, but if we can start a discussion where everyone who wants to learn Japanese would want to contribute, and offer our encouragement to them to help us contribute to the course, there is a high possibility that they will take our encouragement and the course will come out sooner then we may think giving victory and complete, and insane happiness to all of those, who have been begging and demanding through discussions, the course they have been dying to be on this website, and things will be great.