There are many active Chinese users in Hadoop community, a Chinese translation of the core docs will be very helpful to Hadoop newbies and experienced Hadoop users as well. Our team(Distributed computing@Alibaba Search Center) have just worked out a translation of r0.17.x, now we're updating it to r0.18 and r0.19.
The translation covers all the files under xdocs directory in the repos. Thus, we will have a Chinese version for each main doc, and leave the API docs, Wiki, FAQ, Mailing Lists, Release Notes, All Changes as is.