Check if the LanguageIds property on your Pool's MSFT_SIPPoolConfigSetting instance (it's a singleton) for your Pool is empty (eg: NULL).
There are varous ways to do this, you can use wbemtest or Powershell.
With PS it's easy:
$p = gwmi -namespace "root\cimv2" -class "MSFT_SIPPoolConfigSetting" -filter "backend='(local)\\rtc'" for a standard pool or
$p = gwmi -namespace "root\cimv2" -class "MSFT_SIPPoolConfigSetting" -filter "backend='sqlserver\\instance'" for an enterprise pool
Then set LanguageIds with an array containing anything:
$p.LanguageIds = @(1033)
$p.Put()
restart OCS services, then run RgsLang.exe sync from the RGS folder (in the OCS R2 Reskit base folder).
Hope this helps,
Benoit.
Benoit Boudeville - Avanade France & Belux
Microsoft Certified Master - Office Communications Server 2007/R2
http://unifiees.blogspot.com