I do this and it does work pretty well. I do find that calling a switch on language model isn’t without cost and that it’s not an entirely predictable amount of time – but roughly 0.7s or so which can be quite a tricky one for a grammar as the grammar can miss what the person is saying during the switch.
I kinda fixed it through UI but if there’s a way of making sure it’s seamless, or processing speech that was uttered while the language model was switching then that would be awesome!