I read an article on Wikipedia and want to translate and edit it into my language.
How can I do this?
On the page you want to translate, change the language prefix (xxx.wikipedia.org) to your language's prefix. This will bring you to a blank page and Wikipedia will ask you if you want to edit it. If you don't know your language's prefix, find it by going to www.wikipedia.org where all the languages are listed.
For example, if you want to translate the article en.wikipedia.org/wiki/Stack_Exchange_Network to Japanese, go to ja.wikipedia.org/wiki/Stack_Exchange_Network and find the link to edit the page.