Board Thread:Support Requests - Community Management/@comment-30866120-20180409202645/@comment-9605025-20180409205124

If you are planning on making communities in other languages, it is probably best to have that language as the community's language. That way, it is easier for speakers of that language to understand what is going on. That being said, if you are logged in, things such as buttons will be displayed using the language you set for your profile. For example, if you login and go to a Chinese wiki, the page names and whatnot may be in Chinese but things such as the wiki navigation bar and buttons in editors such as the "Publish" button will still be in English for you. With regards to the "backend", things such as MediaWiki markup (parser functions, magic words, etc.), CSS, JS, HTML are all still in English; regardless of the site's language setting. What will change, as I already partially said, is things such as page content, page names, template names, and namespaces.

To see what I am talking about, try taking a look at w:c:comunidad.