How is the best way to extend local language model with custom sentences

unforutnatly the local languge model doesn’t support all commands in the language i eed for my home.

switching light, switches, timer and starting a radio stream is possible with voice assist.

I’m right stuggeling with setting up thermostats

that is what i got:

alias: _Test_Heizung
description: ""
triggers:
  - trigger: conversation
    command:
      - Stelle Heizung in {{area}} auf {{temperature}}
      - Heizung auf {{temperature}}
      - Heizung  {{temperature}}
      - Stelle Heizung auf {{temperature}} Grad
conditions: []
actions:
  - action: climate.set_temperature
    target:
      entity_id: climate.buro_heizung
    data:
      temperature: "{{ trigger.slots.temperature | float }}"
      hvac_mode: auto
  - set_conversation_response: Die Temperatur wurde auf {{temperature}} eingestellt
mode: single

seams that speech to phrase is not adding any output to fire the corresponding automation.

unforuntatly i have no idea where to place the needed files for custom voice and how they have to look a like

You are mixing Jinja Template delimiters and hassil delimiters…

alias: _Test_Heizung
description: ""
triggers:
  - trigger: conversation
    command:
      - "Stelle Heizung in {area} auf {temperature}"
      - "Stelle Heizung auf {temperature} Grad"
      - "Heizung [auf] {temperature}"
conditions: []
actions:
  - action: climate.set_temperature
    target:
      entity_id: climate.buro_heizung
    data:
      temperature: "{{ trigger.slots.temperature | float }}"
      hvac_mode: auto
  - set_conversation_response: Die Temperatur wurde auf {{trigger.slots.temperature}} eingestellt
mode: single