In EZP-26613, the Content / Version models were changed so that they can now represent a Content or a Version translated in several languages. As a result it's not necessary to request the Content or the Version in a given language. Removing that option would have several benefit:

• performances (one less parameter better cache reuse)
• this will allow to switch from one language to another without any further request
• simplify the loading logic (both when viewing and editing a Content/Version).