Back in 2024 this feature was teased in Voice Chapter 7:
Voice Chapter 7 - Supercharged wake words and timers - Home Assistant
Having “OK Nabu” microwakeword launch one pipeline for example english and have “Hey Jarvis” launch another for example dutch.
The text reads:
Not only does it now run on the normal ESP32 chips, those chips can now run three wake words at the same time ! We haven’t added this feature to Home Assistant yet, but expect to be able to trigger your Dutch and English voice assistants, each with their own wake words.
Is this feature available by now? If so I couldn’t find it. If not, is this feature still being developed?
As a multi language household this would be really great if everyone could use their own language by using different wakewords.