It[HTML_REMOVED]s called collaborative translation. To make it simple, people help eachother translate interesting foreign language texts into their nativelanguage. It[HTML_REMOVED]s mostly blog posts, magazine articles, short stories andother materials licensed for free redistribution.
It[HTML_REMOVED]s also sometimes called crowdsourcing.
Translations can be public or private. Private translations will be visibleonly to you and some folks you allow to—your translation team.