14. A system, comprising: one or more computers programmed to perform operations comprising: receiving audio data corresponding to a user speaking a particular term; generating, by an automated speech recognizer, a phonetic representation of the particular term based on the audio data; accessing a database of canonical pronunciations of terms that are used by the automated speech recognizer in transcribing utterances, wherein one or more of the canonical pronunciations are associated with an indication of age-appropriateness; determining that, in the database of canonical pronunciations of terms that are used by the automated speech recognizer in transcribing utterances, the phonetic representation matches a particular canonical pronunciation of a particular term, wherein the particular canonical pronunciation is associated with the indication of age-appropriateness; obtaining data that indicates an age of the user; determining, based on a comparison of (i) the data that indicates the age of the user and (ii) indication of age-appropriateness that is associated with the particular canonical pronunciation of the particular term, that the pronunciation of the particular term by the user is not age-appropriate; based on determining that the pronunciation of the particular term by the user is not age appropriate, selecting a remediation strategy for inducing the user to speak the particular term using an age-appropriate pronunciation, and providing, for output, a transcription of the audio data, or of subsequently received audio data, that is generated by the automated speech recognizer.
14. A system, comprising: one or more computers programmed to perform operations comprising: receiving audio data corresponding to a user speaking a particular term; generating, by an automated speech recognizer, a phonetic representation of the particular term based on the audio data; accessing a database of canonical pronunciations of terms that are used by the automated speech recognizer in transcribing utterances, wherein one or more of the canonical pronunciations are associated with an indication of age-appropriateness; determining that, in the database of canonical pronunciations of terms that are used by the automated speech recognizer in transcribing utterances, the phonetic representation matches a particular canonical pronunciation of a particular term, wherein the particular canonical pronunciation is associated with the indication of age-appropriateness; obtaining data that indicates an age of the user; determining, based on a comparison of (i) the data that indicates the age of the user and (ii) indication of age-appropriateness that is associated with the particular canonical pronunciation of the particular term, that the pronunciation of the particular term by the user is not age-appropriate; based on determining that the pronunciation of the particular term by the user is not age appropriate, selecting a remediation strategy for inducing the user to speak the particular term using an age-appropriate pronunciation, and providing, for output, a transcription of the audio data, or of subsequently received audio data, that is generated by the automated speech recognizer. 16. The system of claim 14 , wherein the operations further comprise storing in the phonetic dictionary, a plurality of canonical pronunciations associated with the particular term, wherein the plurality of canonical pronunciations includes the particular canonical pronunciation selected for the particular term, and wherein two or more of the plurality of canonical pronunciations include an indication of age-appropriateness.