I wish somebody made a text-based assistant that has similar functionality. As a non-native English speaker I don't think voice assistants will ever become accurate enough to be usable by me.
PocketSphinx seems to have better language coverage but lower accuracy than DeepSpeech, which only has English and Mandarin Chinese.
DeepSpeech was not great about 2 years ago when I first started Dexter and, being a Brit, I had to fake an (awful) American accent to make it work. It's come on well in that time though; I can use my own voice now, which is a relief to those near by. No clue how good its Mandarin recognition is however.
Other folks in surrounding threads have flagged Kaldi which I'll try to take a look at as well (though it also looks to be only English and Mandarin too).
https://kalliope-project.github.io/kalliope/api/synapses/#ru...