VoiceRSS how to select a Voice

I was not able how to change to a specific voice (german are about 4 available)

my command:
say(“Hallo”,“voicerss:deDE”, “chromecast:chromecast:xxxx”)

Are the voices listed in the karaf console ( smarthome:voice voices ) ?
What is shown in the openhab log files when the say command is executed ?
What is the OS that you are running OH on ?
Which OH version do you use ?

Hello

openHAB 2.5.6-2 (Release Build) on raspberry pi 3

I get:
openhab> smarthome:voice voices
VoiceRSS - Catalan (Spain) - VoiceRSS (voicerss:caES)
VoiceRSS - Chinese (China) - VoiceRSS (voicerss:zhCN)
VoiceRSS - Chinese (Hong Kong) - VoiceRSS (voicerss:zhHK)
VoiceRSS - Chinese (Taiwan) - VoiceRSS (voicerss:zhTW)
VoiceRSS - Danish (Denmark) - VoiceRSS (voicerss:daDK)
VoiceRSS - Dutch (Netherlands) - VoiceRSS (voicerss:nlNL)
VoiceRSS - English (Australia) - VoiceRSS (voicerss:enAU)
VoiceRSS - English (Canada) - VoiceRSS (voicerss:enCA)
VoiceRSS - English (India) - VoiceRSS (voicerss:enIN)
VoiceRSS - English (United Kingdom) - VoiceRSS (voicerss:enGB)
VoiceRSS - English (United States) - VoiceRSS (voicerss:enUS)
VoiceRSS - Finnish (Finland) - VoiceRSS (voicerss:fiFI)
VoiceRSS - French (Canada) - VoiceRSS (voicerss:frCA)
VoiceRSS - French (France) - VoiceRSS (voicerss:frFR)

  • VoiceRSS - German (Germany) - VoiceRSS (voicerss:deDE)
    VoiceRSS - Italian (Italy) - VoiceRSS (voicerss:itIT)
    VoiceRSS - Japanese (Japan) - VoiceRSS (voicerss:jaJP)
    VoiceRSS - Korean (South Korea) - VoiceRSS (voicerss:koKR)
    VoiceRSS - Norwegian Bokmål (Norway) - VoiceRSS (voicerss:nbNO)
    VoiceRSS - Polish (Poland) - VoiceRSS (voicerss:plPL)
    VoiceRSS - Portuguese (Brazil) - VoiceRSS (voicerss:ptBR)
    VoiceRSS - Portuguese (Portugal) - VoiceRSS (voicerss:ptPT)
    VoiceRSS - Russian (Russia) - VoiceRSS (voicerss:ruRU)
    VoiceRSS - Spanish (Mexico) - VoiceRSS (voicerss:esMX)
    VoiceRSS - Spanish (Spain) - VoiceRSS (voicerss:esES)
    VoiceRSS - Swedish (Sweden) - VoiceRSS (voicerss:svSE)

Do I have to change this on VoiceRSS.

Other than three other voices for Germany also Austria or Swiss are on VoiceRSS

I guess it is not possible to select a different german voice - right?