Train for sounds, not just words?

The first item in tensorflow/lite/micro/examples/micro_speech/train/train_micro_speech_model.ipynb says:

# A comma-delimited list of the words you want to train for.
# The options are: yes,no,up,down,left,right,on,off,stop,go

Is there any way to expand this group to include non-human sounds too? Specifically, I want to add the sound of a cat meowing. Possible? If so, how would I do that?