asterisk users - Apr 2012 - Dial Local doesn't honore the channel language setting

Hi,

on asterisk 1.6.2.22

exten => s,1,Set(CHANNEL(language)=fr)
exten => s,n,Dial(Local/${myEXTEN}@context/n,,)

Transfer, Voicemail, demo, aso are played in english even despite the 
fact that language=fr in sip.conf.

What's wrong? Bug?

Thanks for any hint

-- 
Daniel