Selectively storing, with multiple user accounts and/or to a shared assistant device: speech recognition biasing, NLU biasing, and/or other data

A shared assistant device, comprising:

• microphones;
• memory storing instructions, a local speech-to-text (STT) engine, and a local natural language understanding (NLU) engine;
• and
• one or more processors operable to execute the instructions stored in the memory to:
• receive, via the microphones, audio data that captures a spoken utterance of a user;
• generate, based on processing the audio data using the local STT engine, a transcription that corresponds to the spoken utterance captured in the audio data;
• resolve, based on processing the transcription using the local NLU engine, an assistant action to perform in response to receiving the spoken utterance;
• cause, in response to receiving the spoken utterance, performance of the assistant action resolved based on processing the transcription that corresponds to the spoken utterance;
• determine whether to store, locally at the shared assistant device, one or more NLU biasing parameters that are based on the assistant action resolved locally at the shared assistant device using the local NLU engine;
• in response to determining to store the one or more NLU biasing parameters locally at the shared assistant device:
• store the one or more NLU biasing parameters locally at the shared assistant device;
• wherein storing the one or more NLU biasing parameters locally at the shared assistant device causes future spoken utterances, from any user and received at the shared assistant device, to be processed by the local NLU engine using the one or more NLU biasing parameters.

One or more non-transitory computer readable media storing instructions that, when executed by one or more processors, cause performance of a method comprising:

• receiving, via one or more microphones of the shared assistant device, audio data that captures a spoken utterance of a user;
• generating, based on processing the audio data using a local speech-to-text (STT) engine of the shared assistant device, a transcription that corresponds to the spoken utterance captured in the audio data;
• resolving, based on processing the transcription using a local natural language understanding (NLU) engine of the shared assistant device, an assistant action to perform in response to receiving the spoken utterance;
• causing, in response to receiving the spoken utterance, performance of the assistant action resolved based on processing the transcription that corresponds to the spoken utterance;
• determining whether to store, locally at the shared assistant device, one or more NLU biasing parameters that are based on the assistant action resolved locally at the shared assistant device using the local NLU engine;
• in response to determining to store the one or more NLU biasing parameters locally at the shared assistant device:
• storing the one or more NLU biasing parameters locally at the shared assistant device;
• wherein storing the one or more NLU biasing parameters locally at the shared assistant device causes future spoken utterances, from any user and received at the shared assistant device, to be processed by the local NLU engine using the one or more NLU biasing parameters.