[Freeswitch-users] Change language of voice conference announcements to different language

Hello. We have a trouble with mod_conference. How to change lang? Even with <action application="set" data="default_language=de"/> in log i got [INFO] mod_conference.c:10370 using channel sound prefix: /usr/share/freeswitch/sounds/en/us/callie I see http://lists.freeswitch.org/pipermail/freeswitch-users/2014-October/108544.h... and add ivr/sounds.xml from en... nothing changed. Need i clean conference.conf.xml from all profiles? Or change all sounds to phrase:...? Or create many profiles with only different sound_prefix?