Translation documents are specific to a Review and to a language. It is not possible to have two translations of the same Review in the same language.
Like Reviews, translation documents have versions, and any version of a translation is linked to a specific published version of its source Review. See Document versions.
When a translation is first published, it will have a single published version linked to the latest published version of the source review. Whenever a translation is updated and re-published, a new version is created automatically. The versions can be viewed in the History tab of the document Properties.