Hi Lann,
Switching language models shouldn’t take a notable amount of time under normal circumstances. Are you sure it isn’t some other part of the logical flow that is using the time?
For instance, the initial startup call takes time because of starting the audio driver and calibrating. But the part where the language model is loaded isn’t a significant part of its duration, so setting it in advance of starting wouldn’t make a UX difference.
If loading/switching the models is really taking a lot of time, maybe there is an unusual issue of some kind. What in the logging is leading to that impression?