1. A computer-implemented method comprising: receiving audio data encoding a voice query from a user; obtaining, by an automated speech recognizer, a transcription of the voice query from the audio data, wherein the transcription includes a particular term; determining, from the audio data, custom pronunciation data that reflects a user's pronunciation for the particular term; generating a spoken acknowledgment of the voice query, wherein the spoken acknowledgment includes the particular term, and wherein, when output, the particular term is spoken in accordance with the user's pronunciation for the particular term based at least on the custom pronunciation data that was determined from the audio data; providing the spoken acknowledgment for output; and providing the voice query for execution.