Hi Wang,
It interest me too.
The XWiki actually allows to change default
languages in administrator panel and also to add languages (as much as we
need). During edition of documents we have the possibility to switch
from one language to another.Then after saving document and displaying it,
only the language in which it was translated are dispayed.
Then, the XWiki changes the interface language only
into the language of the active document. So we can't change the interface
language (+help doc) without having displayed document in the same
language.
Are there any solution to add language selection
without taking in consideration the language of active document.