translated property descriptor only uses the language of the current user
Tryton 3.4: When I use a translated string in a document, then it is always translated in the language of the current user, but never in the language of the party defined with _US')>
S.a.:
* http://www.tryton.org/~irclog/2015-10-07.log.html#t2015-10-07%2016:11
* http://www.tryton.org/~irclog/2015-09-25.log.html#t2015-09-25%2018:05